690887836 has 6 divisors (see below), whose sum is σ = 1209053720. Its totient is φ = 345443916.

The previous prime is 690887809. The next prime is 690887839. The reversal of 690887836 is 638788096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690887839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86360976 + ... + 86360983.

Almost surely, 2^690887836 is an apocalyptic number.

It is an amenable number.

690887836 is a deficient number, since it is larger than the sum of its proper divisors (518165884).

690887836 is a wasteful number, since it uses less digits than its factorization.

690887836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172721963 (or 172721961 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 690887836 is about 26284.7453097800. The cubic root of 690887836 is about 884.0344352317.

The spelling of 690887836 in words is "six hundred ninety million, eight hundred eighty-seven thousand, eight hundred thirty-six".