673211961 has 6 divisors (see below), whose sum is σ = 972417290. Its totient is φ = 448807968.

The previous prime is 673211941. The next prime is 673211969. The reversal of 673211961 is 169112376.

It can be written as a sum of positive squares in only one way, i.e., 434972736 + 238239225 = 20856^2 + 15435^2 .

It is a de Polignac number, because none of the positive numbers 2^k-673211961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673211969) 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 5 ways as a sum of consecutive naturals, for example, 37400656 + ... + 37400673.

Almost surely, 2^673211961 is an apocalyptic number.

It is an amenable number.

673211961 is a deficient number, since it is larger than the sum of its proper divisors (299205329).

673211961 is a wasteful number, since it uses less digits than its factorization.

673211961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74801335 (or 74801332 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 673211961 is about 25946.3284685907. The cubic root of 673211961 is about 876.4300798317.

The spelling of 673211961 in words is "six hundred seventy-three million, two hundred eleven thousand, nine hundred sixty-one".