671903236 has 12 divisors (see below), whose sum is σ = 1176217420. Its totient is φ = 335841120.

The previous prime is 671903231. The next prime is 671903261. The reversal of 671903236 is 632309176.

It can be written as a sum of positive squares in 2 ways, for example, as 262245636 + 409657600 = 16194^2 + 20240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 671903195 and 671903204.

It is not an unprimeable number, because it can be changed into a prime (671903231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13095 + ... + 38926.

Almost surely, 2^671903236 is an apocalyptic number.

It is an amenable number.

671903236 is a deficient number, since it is larger than the sum of its proper divisors (504314184).

671903236 is a wasteful number, since it uses less digits than its factorization.

671903236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55254 (or 55252 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 671903236 is about 25921.0963502704. The cubic root of 671903236 is about 875.8617843137.

The spelling of 671903236 in words is "six hundred seventy-one million, nine hundred three thousand, two hundred thirty-six".