690676865 has 8 divisors (see below), whose sum is σ = 836416680. Its totient is φ = 547471872.

The previous prime is 690676843. The next prime is 690676873. The reversal of 690676865 is 568676096.

It can be written as a sum of positive squares in 4 ways, for example, as 58003456 + 632673409 = 7616^2 + 25153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690676865 - 2⁶ = 690676801 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633104 + ... + 634193.

It is an arithmetic number, because the mean of its divisors is an integer number (104552085).

Almost surely, 2^690676865 is an apocalyptic number.

It is an amenable number.

690676865 is a deficient number, since it is larger than the sum of its proper divisors (145739815).

690676865 is a wasteful number, since it uses less digits than its factorization.

690676865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267411.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 690676865 is about 26280.7318200997. The cubic root of 690676865 is about 883.9444425169.

The spelling of 690676865 in words is "six hundred ninety million, six hundred seventy-six thousand, eight hundred sixty-five".