672494639 has 2 divisors, whose sum is σ = 672494640. Its totient is φ = 672494638.

The previous prime is 672494617. The next prime is 672494651. The reversal of 672494639 is 936494276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 672494639 - 2²⁴ = 655717423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672494609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336247319 + 336247320.

It is an arithmetic number, because the mean of its divisors is an integer number (336247320).

Almost surely, 2^672494639 is an apocalyptic number.

672494639 is a deficient number, since it is larger than the sum of its proper divisors (1).

672494639 is an equidigital number, since it uses as much as digits as its factorization.

672494639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 50.

The square root of 672494639 is about 25932.5015954882. The cubic root of 672494639 is about 876.1186840960.

The spelling of 672494639 in words is "six hundred seventy-two million, four hundred ninety-four thousand, six hundred thirty-nine".