139005739 has 2 divisors, whose sum is σ = 139005740. Its totient is φ = 139005738.

The previous prime is 139005731. The next prime is 139005749. The reversal of 139005739 is 937500931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139005739 - 2³ = 139005731 is a prime.

It is a super-2 number, since 2×139005739² = 38645190949872242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139005698 and 139005707.

It is not a weakly prime, because it can be changed into another prime (139005731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69502869 + 69502870.

It is an arithmetic number, because the mean of its divisors is an integer number (69502870).

Almost surely, 2^139005739 is an apocalyptic number.

139005739 is a deficient number, since it is larger than the sum of its proper divisors (1).

139005739 is an equidigital number, since it uses as much as digits as its factorization.

139005739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 139005739 is about 11790.0695078528. The cubic root of 139005739 is about 518.0172758011.

The spelling of 139005739 in words is "one hundred thirty-nine million, five thousand, seven hundred thirty-nine".