1005689641 has 4 divisors (see below), whose sum is σ = 1097115984. Its totient is φ = 914263300.

The previous prime is 1005689617. The next prime is 1005689701. The reversal of 1005689641 is 1469865001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1005689641 - 2⁹ = 1005689129 is a prime.

It is a super-2 number, since 2×1005689641² = 2022823308029417762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1005689594 and 1005689603.

It is not an unprimeable number, because it can be changed into a prime (1005689141) 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, 45713155 + ... + 45713176.

It is an arithmetic number, because the mean of its divisors is an integer number (274278996).

Almost surely, 2^1005689641 is an apocalyptic number.

1005689641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1005689641 is a deficient number, since it is larger than the sum of its proper divisors (91426343).

1005689641 is an equidigital number, since it uses as much as digits as its factorization.

1005689641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91426342.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1005689641 is about 31712.6101259420. The cubic root of 1005689641 is about 1001.8929614360.

The spelling of 1005689641 in words is "one billion, five million, six hundred eighty-nine thousand, six hundred forty-one".