139351279 has 2 divisors, whose sum is σ = 139351280. Its totient is φ = 139351278.

The previous prime is 139351271. The next prime is 139351283. The reversal of 139351279 is 972153931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139351279 - 2³ = 139351271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139351271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69675639 + 69675640.

It is an arithmetic number, because the mean of its divisors is an integer number (69675640).

Almost surely, 2^139351279 is an apocalyptic number.

139351279 is a deficient number, since it is larger than the sum of its proper divisors (1).

139351279 is an equidigital number, since it uses as much as digits as its factorization.

139351279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 139351279 is about 11804.7142701550. The cubic root of 139351279 is about 518.4461491691.

The spelling of 139351279 in words is "one hundred thirty-nine million, three hundred fifty-one thousand, two hundred seventy-nine".