690915964 has 12 divisors (see below), whose sum is σ = 1209298104. Its totient is φ = 345402224.

The previous prime is 690915961. The next prime is 690915977. The reversal of 690915964 is 469519096.

690915964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690915961) 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, 27879 + ... + 46465.

It is an arithmetic number, because the mean of its divisors is an integer number (100774842).

Almost surely, 2^690915964 is an apocalyptic number.

It is an amenable number.

690915964 is a deficient number, since it is larger than the sum of its proper divisors (518382140).

690915964 is a wasteful number, since it uses less digits than its factorization.

690915964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27884 (or 27882 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 690915964 is about 26285.2803675365. The cubic root of 690915964 is about 884.0464322505.

The spelling of 690915964 in words is "six hundred ninety million, nine hundred fifteen thousand, nine hundred sixty-four".