690157012 has 6 divisors (see below), whose sum is σ = 1207774778. Its totient is φ = 345078504.

The previous prime is 690156983. The next prime is 690157033. The reversal of 690157012 is 210751096.

690157012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 442849936 + 247307076 = 21044^2 + 15726^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86269623 + ... + 86269630.

Almost surely, 2^690157012 is an apocalyptic number.

It is an amenable number.

690157012 is a deficient number, since it is larger than the sum of its proper divisors (517617766).

690157012 is a wasteful number, since it uses less digits than its factorization.

690157012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172539257 (or 172539255 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 690157012 is about 26270.8395754685. The cubic root of 690157012 is about 883.7226135009.

The spelling of 690157012 in words is "six hundred ninety million, one hundred fifty-seven thousand, twelve".