139452739 has 2 divisors, whose sum is σ = 139452740. Its totient is φ = 139452738.

The previous prime is 139452737. The next prime is 139452743. The reversal of 139452739 is 937254931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139452739 - 2¹ = 139452737 is a prime.

Together with 139452737, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 139452695 and 139452704.

It is not a weakly prime, because it can be changed into another prime (139452737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69726369 + 69726370.

It is an arithmetic number, because the mean of its divisors is an integer number (69726370).

Almost surely, 2^139452739 is an apocalyptic number.

139452739 is a deficient number, since it is larger than the sum of its proper divisors (1).

139452739 is an equidigital number, since it uses as much as digits as its factorization.

139452739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 139452739 is about 11809.0109238666. The cubic root of 139452739 is about 518.5719434583.

The spelling of 139452739 in words is "one hundred thirty-nine million, four hundred fifty-two thousand, seven hundred thirty-nine".