139179269 has 2 divisors, whose sum is σ = 139179270. Its totient is φ = 139179268.

The previous prime is 139179263. The next prime is 139179281. The reversal of 139179269 is 962971931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98704225 + 40475044 = 9935^2 + 6362^2 .

It is an emirp because it is prime and its reverse (962971931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139179269 - 2⁴ = 139179253 is a prime.

It is a super-2 number, since 2×139179269² = 38741737838748722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139179263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69589634 + 69589635.

It is an arithmetic number, because the mean of its divisors is an integer number (69589635).

Almost surely, 2^139179269 is an apocalyptic number.

It is an amenable number.

139179269 is a deficient number, since it is larger than the sum of its proper divisors (1).

139179269 is an equidigital number, since it uses as much as digits as its factorization.

139179269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 47.

The square root of 139179269 is about 11797.4263718830. The cubic root of 139179269 is about 518.2327445019.

The spelling of 139179269 in words is "one hundred thirty-nine million, one hundred seventy-nine thousand, two hundred sixty-nine".