254139979 has 2 divisors, whose sum is σ = 254139980. Its totient is φ = 254139978.

The previous prime is 254139967. The next prime is 254139997. The reversal of 254139979 is 979931452.

Together with next prime (254139997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254139979 - 2¹⁷ = 254008907 is a prime.

It is a super-2 number, since 2×254139979² = 129174257852240882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (254139959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127069989 + 127069990.

It is an arithmetic number, because the mean of its divisors is an integer number (127069990).

Almost surely, 2^254139979 is an apocalyptic number.

254139979 is a deficient number, since it is larger than the sum of its proper divisors (1).

254139979 is an equidigital number, since it uses as much as digits as its factorization.

254139979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The square root of 254139979 is about 15941.7683774417. The cubic root of 254139979 is about 633.4188691183.

The spelling of 254139979 in words is "two hundred fifty-four million, one hundred thirty-nine thousand, nine hundred seventy-nine".