690543634 has 8 divisors (see below), whose sum is σ = 1129980528. Its totient is φ = 313883460.

The previous prime is 690543589. The next prime is 690543643. The reversal of 690543634 is 436345096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15694152 + ... + 15694195.

It is an arithmetic number, because the mean of its divisors is an integer number (141247566).

Almost surely, 2^690543634 is an apocalyptic number.

690543634 is a deficient number, since it is larger than the sum of its proper divisors (439436894).

690543634 is a wasteful number, since it uses less digits than its factorization.

690543634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31388360.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 690543634 is about 26278.1969320576. The cubic root of 690543634 is about 883.8876014762.

The spelling of 690543634 in words is "six hundred ninety million, five hundred forty-three thousand, six hundred thirty-four".