139905739 has 2 divisors, whose sum is σ = 139905740. Its totient is φ = 139905738.

The previous prime is 139905737. The next prime is 139905749. The reversal of 139905739 is 937509931.

139905739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139905739 - 2¹ = 139905737 is a prime.

It is a super-2 number, since 2×139905739² = 39147231610272242, which contains 22 as substring.

Together with 139905737, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (139905737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69952869 + 69952870.

It is an arithmetic number, because the mean of its divisors is an integer number (69952870).

Almost surely, 2^139905739 is an apocalyptic number.

139905739 is a deficient number, since it is larger than the sum of its proper divisors (1).

139905739 is an equidigital number, since it uses as much as digits as its factorization.

139905739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 139905739 is about 11828.1756412390. The cubic root of 139905739 is about 519.1328483815.

The spelling of 139905739 in words is "one hundred thirty-nine million, nine hundred five thousand, seven hundred thirty-nine".