279455923 has 2 divisors, whose sum is σ = 279455924. Its totient is φ = 279455922.

The previous prime is 279455879. The next prime is 279455941. The reversal of 279455923 is 329554972.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279455923 is a prime.

It is a super-2 number, since 2×279455923² = 156191225799563858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (279455623) 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, 139727961 + 139727962.

It is an arithmetic number, because the mean of its divisors is an integer number (139727962).

Almost surely, 2^279455923 is an apocalyptic number.

279455923 is a deficient number, since it is larger than the sum of its proper divisors (1).

279455923 is an equidigital number, since it uses as much as digits as its factorization.

279455923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The square root of 279455923 is about 16716.9352155232. The cubic root of 279455923 is about 653.7892463403.

The spelling of 279455923 in words is "two hundred seventy-nine million, four hundred fifty-five thousand, nine hundred twenty-three".