139179097 has 2 divisors, whose sum is σ = 139179098. Its totient is φ = 139179096.

The previous prime is 139179071. The next prime is 139179151. The reversal of 139179097 is 790971931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135001161 + 4177936 = 11619^2 + 2044^2 .

It is an emirp because it is prime and its reverse (790971931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139179097 is a prime.

It is not a weakly prime, because it can be changed into another prime (139176097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69589548 + 69589549.

It is an arithmetic number, because the mean of its divisors is an integer number (69589549).

Almost surely, 2^139179097 is an apocalyptic number.

It is an amenable number.

139179097 is a deficient number, since it is larger than the sum of its proper divisors (1).

139179097 is an equidigital number, since it uses as much as digits as its factorization.

139179097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107163, while the sum is 46.

The square root of 139179097 is about 11797.4190821552. The cubic root of 139179097 is about 518.2325310217.

The spelling of 139179097 in words is "one hundred thirty-nine million, one hundred seventy-nine thousand, ninety-seven".