690075172 has 6 divisors (see below), whose sum is σ = 1207631558. Its totient is φ = 345037584.

The previous prime is 690075163. The next prime is 690075179. The reversal of 690075172 is 271570096.

It can be written as a sum of positive squares in only one way, i.e., 439992576 + 250082596 = 20976^2 + 15814^2 .

It is not an unprimeable number, because it can be changed into a prime (690075179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86259393 + ... + 86259400.

Almost surely, 2^690075172 is an apocalyptic number.

It is an amenable number.

690075172 is a deficient number, since it is larger than the sum of its proper divisors (517556386).

690075172 is a wasteful number, since it uses less digits than its factorization.

690075172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172518797 (or 172518795 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 690075172 is about 26269.2819087237. The cubic root of 690075172 is about 883.6876810066.

The spelling of 690075172 in words is "six hundred ninety million, seventy-five thousand, one hundred seventy-two".