671903237 has 4 divisors (see below), whose sum is σ = 674916480. Its totient is φ = 668889996.

The previous prime is 671903231. The next prime is 671903261. The reversal of 671903237 is 732309176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671903237 - 2⁶ = 671903173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671903237.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1506287 + ... + 1506732.

It is an arithmetic number, because the mean of its divisors is an integer number (168729120).

Almost surely, 2^671903237 is an apocalyptic number.

It is an amenable number.

671903237 is a deficient number, since it is larger than the sum of its proper divisors (3013243).

671903237 is a wasteful number, since it uses less digits than its factorization.

671903237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013242.

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 671903237 is about 25921.0963695597. The cubic root of 671903237 is about 875.8617847482.

The spelling of 671903237 in words is "six hundred seventy-one million, nine hundred three thousand, two hundred thirty-seven".