672989423 has 2 divisors, whose sum is σ = 672989424. Its totient is φ = 672989422.

The previous prime is 672989417. The next prime is 672989441. The reversal of 672989423 is 324989276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 672989423 - 2¹⁴ = 672973039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672989623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336494711 + 336494712.

It is an arithmetic number, because the mean of its divisors is an integer number (336494712).

Almost surely, 2^672989423 is an apocalyptic number.

672989423 is a deficient number, since it is larger than the sum of its proper divisors (1).

672989423 is an equidigital number, since it uses as much as digits as its factorization.

672989423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The square root of 672989423 is about 25942.0396846509. The cubic root of 672989423 is about 876.3334978223. Note that the first 3 decimals are identical.

The spelling of 672989423 in words is "six hundred seventy-two million, nine hundred eighty-nine thousand, four hundred twenty-three".