139732939 has 2 divisors, whose sum is σ = 139732940. Its totient is φ = 139732938.

The previous prime is 139732871. The next prime is 139732951. The reversal of 139732939 is 939237931.

It is a strong prime.

It is an emirp because it is prime and its reverse (939237931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139732939 - 2⁷ = 139732811 is a prime.

It is a super-4 number, since 4×139732939⁴ (a number of 34 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (139732039) 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, 69866469 + 69866470.

It is an arithmetic number, because the mean of its divisors is an integer number (69866470).

Almost surely, 2^139732939 is an apocalyptic number.

139732939 is a deficient number, since it is larger than the sum of its proper divisors (1).

139732939 is an equidigital number, since it uses as much as digits as its factorization.

139732939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 46.

The square root of 139732939 is about 11820.8687920982. The cubic root of 139732939 is about 518.9190303381.

The spelling of 139732939 in words is "one hundred thirty-nine million, seven hundred thirty-two thousand, nine hundred thirty-nine".