672691634 has 4 divisors (see below), whose sum is σ = 1009037454. Its totient is φ = 336345816.

The previous prime is 672691619. The next prime is 672691693. The reversal of 672691634 is 436196276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 342361009 + 330330625 = 18503^2 + 18175^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168172907 + ... + 168172910.

Almost surely, 2^672691634 is an apocalyptic number.

672691634 is a deficient number, since it is larger than the sum of its proper divisors (336345820).

672691634 is a wasteful number, since it uses less digits than its factorization.

672691634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336345819.

The product of its digits is 326592, while the sum is 44.

The square root of 672691634 is about 25936.2995433042. The cubic root of 672691634 is about 876.2042233903.

The spelling of 672691634 in words is "six hundred seventy-two million, six hundred ninety-one thousand, six hundred thirty-four".