102686487 has 4 divisors (see below), whose sum is σ = 136915320. Its totient is φ = 68457656.

The previous prime is 102686473. The next prime is 102686489. The reversal of 102686487 is 784686201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102686487 - 2¹⁴ = 102670103 is a prime.

It is a super-2 number, since 2×102686487² = 21089029224802338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102686489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17114412 + ... + 17114417.

It is an arithmetic number, because the mean of its divisors is an integer number (34228830).

Almost surely, 2^102686487 is an apocalyptic number.

102686487 is a deficient number, since it is larger than the sum of its proper divisors (34228833).

102686487 is an equidigital number, since it uses as much as digits as its factorization.

102686487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34228832.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 102686487 is about 10133.4341168234. The cubic root of 102686487 is about 468.2787303381.

The spelling of 102686487 in words is "one hundred two million, six hundred eighty-six thousand, four hundred eighty-seven".