279420139 has 2 divisors, whose sum is σ = 279420140. Its totient is φ = 279420138.

The previous prime is 279420107. The next prime is 279420157. The reversal of 279420139 is 931024972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 279420139 - 2⁵ = 279420107 is a prime.

It is a super-2 number, since 2×279420139² = 156151228157558642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 279420098 and 279420107.

It is not a weakly prime, because it can be changed into another prime (279420179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139710069 + 139710070.

It is an arithmetic number, because the mean of its divisors is an integer number (139710070).

Almost surely, 2^279420139 is an apocalyptic number.

279420139 is a deficient number, since it is larger than the sum of its proper divisors (1).

279420139 is an equidigital number, since it uses as much as digits as its factorization.

279420139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 279420139 is about 16715.8648893798. The cubic root of 279420139 is about 653.7613395028.

The spelling of 279420139 in words is "two hundred seventy-nine million, four hundred twenty thousand, one hundred thirty-nine".