690500172 has 12 divisors (see below), whose sum is σ = 1611167096. Its totient is φ = 230166720.

The previous prime is 690500159. The next prime is 690500183. The reversal of 690500172 is 271005096.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28770829 + ... + 28770852.

Almost surely, 2^690500172 is an apocalyptic number.

It is an amenable number.

690500172 is an abundant number, since it is smaller than the sum of its proper divisors (920666924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690500172 is a wasteful number, since it uses less digits than its factorization.

690500172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57541688 (or 57541686 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 690500172 is about 26277.3699597201. The cubic root of 690500172 is about 883.8690574736.

The spelling of 690500172 in words is "six hundred ninety million, five hundred thousand, one hundred seventy-two".