139001879 has 2 divisors, whose sum is σ = 139001880. Its totient is φ = 139001878.

The previous prime is 139001851. The next prime is 139001909. The reversal of 139001879 is 978100931.

It is a weak prime.

It is an emirp because it is prime and its reverse (978100931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139001879 - 2⁸ = 139001623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139001279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69500939 + 69500940.

It is an arithmetic number, because the mean of its divisors is an integer number (69500940).

Almost surely, 2^139001879 is an apocalyptic number.

139001879 is a deficient number, since it is larger than the sum of its proper divisors (1).

139001879 is an equidigital number, since it uses as much as digits as its factorization.

139001879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 139001879 is about 11789.9058096322. The cubic root of 139001879 is about 518.0124808787.

The spelling of 139001879 in words is "one hundred thirty-nine million, one thousand, eight hundred seventy-nine".