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10686985 = 52137397
BaseRepresentation
bin101000110001…
…001000001001
3202002221210021
4220301020021
510213440420
61021020441
7156560251
oct50611011
922087707
1010686985
11603a321
1236b4721
1322a247a
1415c2961
15e117aa
hexa31209

10686985 has 4 divisors (see below), whose sum is σ = 12824388. Its totient is φ = 8549584.

The previous prime is 10686983. The next prime is 10687007. The reversal of 10686985 is 58968601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58968601 = 197299333.

It can be written as a sum of positive squares in 2 ways, for example, as 4888521 + 5798464 = 2211^2 + 2408^2 .

It is a cyclic number.

It is not a de Polignac number, because 10686985 - 21 = 10686983 is a prime.

It is a super-2 number, since 2×106869852 = 228423296780450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10686983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068694 + ... + 1068703.

It is an arithmetic number, because the mean of its divisors is an integer number (3206097).

Almost surely, 210686985 is an apocalyptic number.

It is an amenable number.

10686985 is a deficient number, since it is larger than the sum of its proper divisors (2137403).

10686985 is an equidigital number, since it uses as much as digits as its factorization.

10686985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137402.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 10686985 is about 3269.0954406380. The cubic root of 10686985 is about 220.2681647285.

The spelling of 10686985 in words is "ten million, six hundred eighty-six thousand, nine hundred eighty-five".

Divisors: 1 5 2137397 10686985