139368739 has 2 divisors, whose sum is σ = 139368740. Its totient is φ = 139368738.

The previous prime is 139368701. The next prime is 139368763. The reversal of 139368739 is 937863931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139368739 - 2¹³ = 139360547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139368692 and 139368701.

It is not a weakly prime, because it can be changed into another prime (139368769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69684369 + 69684370.

It is an arithmetic number, because the mean of its divisors is an integer number (69684370).

Almost surely, 2^139368739 is an apocalyptic number.

139368739 is a deficient number, since it is larger than the sum of its proper divisors (1).

139368739 is an equidigital number, since it uses as much as digits as its factorization.

139368739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 49.

The square root of 139368739 is about 11805.4537820450. The cubic root of 139368739 is about 518.4678011453.

The spelling of 139368739 in words is "one hundred thirty-nine million, three hundred sixty-eight thousand, seven hundred thirty-nine".