690457023 has 24 divisors (see below), whose sum is σ = 1075930128. Its totient is φ = 425048832.

The previous prime is 690456953. The next prime is 690457039. The reversal of 690457023 is 320754096.

690457023 is a `hidden beast` number, since 69 + 0 + 4 + 570 + 23 = 666.

It is not a de Polignac number, because 690457023 - 2¹⁰ = 690455999 is a prime.

It is a super-2 number, since 2×690457023² = 953461801220045058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690457073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34465 + ... + 50682.

It is an arithmetic number, because the mean of its divisors is an integer number (44830422).

Almost surely, 2^690457023 is an apocalyptic number.

690457023 is a deficient number, since it is larger than the sum of its proper divisors (385473105).

690457023 is a wasteful number, since it uses less digits than its factorization.

690457023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85223 (or 85220 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 690457023 is about 26276.5489172380. The cubic root of 690457023 is about 883.8506462494.

The spelling of 690457023 in words is "six hundred ninety million, four hundred fifty-seven thousand, twenty-three".