690706431 has 12 divisors (see below), whose sum is σ = 1000899120. Its totient is φ = 458988480.

The previous prime is 690706421. The next prime is 690706433. The reversal of 690706431 is 134607096.

690706431 is a `hidden beast` number, since 6 + 9 + 0 + 7 + 0 + 643 + 1 = 666.

It is not a de Polignac number, because 690706431 - 2¹¹ = 690704383 is a prime.

It is a super-2 number, since 2×690706431² = 954150747649515522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690706433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120586 + ... + 126183.

It is an arithmetic number, because the mean of its divisors is an integer number (83408260).

Almost surely, 2^690706431 is an apocalyptic number.

690706431 is a deficient number, since it is larger than the sum of its proper divisors (310192689).

690706431 is a wasteful number, since it uses less digits than its factorization.

690706431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247086 (or 247083 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 690706431 is about 26281.2943174418. The cubic root of 690706431 is about 883.9570554235.

The spelling of 690706431 in words is "six hundred ninety million, seven hundred six thousand, four hundred thirty-one".