634973690 has 32 divisors (see below), whose sum is σ = 1259508096. Its totient is φ = 228997440.

The previous prime is 634973663. The next prime is 634973699. The reversal of 634973690 is 96379436.

It is a super-2 number, since 2×634973690² = 806383173984432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (634973699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51206 + ... + 62385.

It is an arithmetic number, because the mean of its divisors is an integer number (39359628).

Almost surely, 2^634973690 is an apocalyptic number.

634973690 is a deficient number, since it is larger than the sum of its proper divisors (624534406).

634973690 is a wasteful number, since it uses less digits than its factorization.

634973690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113654.

The product of its (nonzero) digits is 734832, while the sum is 47.

The square root of 634973690 is about 25198.6842910498. The cubic root of 634973690 is about 859.5119323663.

The spelling of 634973690 in words is "six hundred thirty-four million, nine hundred seventy-three thousand, six hundred ninety".