690676641 has 12 divisors (see below), whose sum is σ = 998050768. Its totient is φ = 460263384.

The previous prime is 690676607. The next prime is 690676687. The reversal of 690676641 is 146676096.

It is a happy number.

It is not a de Polignac number, because 690676641 - 2¹⁵ = 690643873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (690676601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9846 + ... + 38448.

Almost surely, 2^690676641 is an apocalyptic number.

It is an amenable number.

690676641 is a deficient number, since it is larger than the sum of its proper divisors (307374127).

690676641 is a wasteful number, since it uses less digits than its factorization.

690676641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31292 (or 31289 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 690676641 is about 26280.7275584220. The cubic root of 690676641 is about 883.9443469567.

The spelling of 690676641 in words is "six hundred ninety million, six hundred seventy-six thousand, six hundred forty-one".