690762962921 has 4 divisors (see below), whose sum is σ = 690806371200. Its totient is φ = 690719554644.

The previous prime is 690762962873. The next prime is 690762962947. The reversal of 690762962921 is 129269267096.

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 690762962921 - 2³⁰ = 689689221097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690762962621) 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, 21680261 + ... + 21712098.

It is an arithmetic number, because the mean of its divisors is an integer number (172701592800).

Almost surely, 2^690762962921 is an apocalyptic number.

It is an amenable number.

690762962921 is a deficient number, since it is larger than the sum of its proper divisors (43408279).

690762962921 is a wasteful number, since it uses less digits than its factorization.

690762962921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43408278.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 690762962921 in words is "six hundred ninety billion, seven hundred sixty-two million, nine hundred sixty-two thousand, nine hundred twenty-one".