139071739 has 2 divisors, whose sum is σ = 139071740. Its totient is φ = 139071738.

The previous prime is 139071727. The next prime is 139071743. The reversal of 139071739 is 937170931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139071739 - 2⁵ = 139071707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139071719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69535869 + 69535870.

It is an arithmetic number, because the mean of its divisors is an integer number (69535870).

Almost surely, 2^139071739 is an apocalyptic number.

139071739 is a deficient number, since it is larger than the sum of its proper divisors (1).

139071739 is an equidigital number, since it uses as much as digits as its factorization.

139071739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 40.

The square root of 139071739 is about 11792.8681413810. The cubic root of 139071739 is about 518.0992477899.

The spelling of 139071739 in words is "one hundred thirty-nine million, seventy-one thousand, seven hundred thirty-nine".