690553064 has 8 divisors (see below), whose sum is σ = 1294787010. Its totient is φ = 345276528.

The previous prime is 690553033. The next prime is 690553067. The reversal of 690553064 is 460355096.

It can be written as a sum of positive squares in only one way, i.e., 512116900 + 178436164 = 22630^2 + 13358^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (690553067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43159559 + ... + 43159574.

Almost surely, 2^690553064 is an apocalyptic number.

It is an amenable number.

690553064 is a deficient number, since it is larger than the sum of its proper divisors (604233946).

690553064 is a wasteful number, since it uses less digits than its factorization.

690553064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86319139 (or 86319135 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 690553064 is about 26278.3763577585. The cubic root of 690553064 is about 883.8916248870.

The spelling of 690553064 in words is "six hundred ninety million, five hundred fifty-three thousand, sixty-four".