690314644 has 6 divisors (see below), whose sum is σ = 1208050634. Its totient is φ = 345157320.

The previous prime is 690314629. The next prime is 690314659. The reversal of 690314644 is 446413096.

It is an interprime number because it is at equal distance from previous prime (690314629) and next prime (690314659).

It can be written as a sum of positive squares in only one way, i.e., 425927044 + 264387600 = 20638^2 + 16260^2 .

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, 86289327 + ... + 86289334.

Almost surely, 2^690314644 is an apocalyptic number.

It is an amenable number.

690314644 is a deficient number, since it is larger than the sum of its proper divisors (517735990).

690314644 is a wasteful number, since it uses less digits than its factorization.

690314644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172578665 (or 172578663 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 690314644 is about 26273.8395366951. The cubic root of 690314644 is about 883.7898891866.

The spelling of 690314644 in words is "six hundred ninety million, three hundred fourteen thousand, six hundred forty-four".