690574893 has 16 divisors (see below), whose sum is σ = 975045120. Its totient is φ = 433534896.

The previous prime is 690574889. The next prime is 690574903. The reversal of 690574893 is 398475096.

It is not a de Polignac number, because 690574893 - 2² = 690574889 is a prime.

It is a super-2 number, since 2×690574893² = 953787365683922898, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690574873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26755 + ... + 45792.

It is an arithmetic number, because the mean of its divisors is an integer number (60940320).

Almost surely, 2^690574893 is an apocalyptic number.

It is an amenable number.

690574893 is a deficient number, since it is larger than the sum of its proper divisors (284470227).

690574893 is a wasteful number, since it uses less digits than its factorization.

690574893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72736.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 690574893 is about 26278.7916959665. The cubic root of 690574893 is about 883.9009383238.

The spelling of 690574893 in words is "six hundred ninety million, five hundred seventy-four thousand, eight hundred ninety-three".