139319737 has 2 divisors, whose sum is σ = 139319738. Its totient is φ = 139319736.

The previous prime is 139319731. The next prime is 139319771. The reversal of 139319737 is 737913931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136165561 + 3154176 = 11669^2 + 1776^2 .

It is an emirp because it is prime and its reverse (737913931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139319737 - 2¹⁵ = 139286969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139319693 and 139319702.

It is not a weakly prime, because it can be changed into another prime (139319731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69659868 + 69659869.

It is an arithmetic number, because the mean of its divisors is an integer number (69659869).

Almost surely, 2^139319737 is an apocalyptic number.

It is an amenable number.

139319737 is a deficient number, since it is larger than the sum of its proper divisors (1).

139319737 is an equidigital number, since it uses as much as digits as its factorization.

139319737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107163, while the sum is 43.

The square root of 139319737 is about 11803.3782028706. The cubic root of 139319737 is about 518.4070296563.

The spelling of 139319737 in words is "one hundred thirty-nine million, three hundred nineteen thousand, seven hundred thirty-seven".