139270939 has 2 divisors, whose sum is σ = 139270940. Its totient is φ = 139270938.

The previous prime is 139270921. The next prime is 139270961. The reversal of 139270939 is 939072931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139270939 - 2⁵ = 139270907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139270895 and 139270904.

It is not a weakly prime, because it can be changed into another prime (139270039) 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, 69635469 + 69635470.

It is an arithmetic number, because the mean of its divisors is an integer number (69635470).

Almost surely, 2^139270939 is an apocalyptic number.

139270939 is a deficient number, since it is larger than the sum of its proper divisors (1).

139270939 is an equidigital number, since it uses as much as digits as its factorization.

139270939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 139270939 is about 11801.3109017600. The cubic root of 139270939 is about 518.3464970022.

The spelling of 139270939 in words is "one hundred thirty-nine million, two hundred seventy thousand, nine hundred thirty-nine".