672989479 has 2 divisors, whose sum is σ = 672989480. Its totient is φ = 672989478.

The previous prime is 672989441. The next prime is 672989521. The reversal of 672989479 is 974989276.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672989479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672989179) 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 as a sum of consecutive naturals, namely, 336494739 + 336494740.

It is an arithmetic number, because the mean of its divisors is an integer number (336494740).

Almost surely, 2^672989479 is an apocalyptic number.

672989479 is a deficient number, since it is larger than the sum of its proper divisors (1).

672989479 is an equidigital number, since it uses as much as digits as its factorization.

672989479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 61.

The square root of 672989479 is about 25942.0407639800. The cubic root of 672989479 is about 876.3335221291. Note that the first 3 decimals are identical.

The spelling of 672989479 in words is "six hundred seventy-two million, nine hundred eighty-nine thousand, four hundred seventy-nine".