139452737 has 2 divisors, whose sum is σ = 139452738. Its totient is φ = 139452736.

The previous prime is 139452701. The next prime is 139452739. The reversal of 139452737 is 737254931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139452481 + 256 = 11809^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 139452737 - 2¹⁶ = 139387201 is a prime.

Together with 139452739, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 139452694 and 139452703.

It is not a weakly prime, because it can be changed into another prime (139452739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69726368 + 69726369.

It is an arithmetic number, because the mean of its divisors is an integer number (69726369).

Almost surely, 2^139452737 is an apocalyptic number.

It is an amenable number.

139452737 is a deficient number, since it is larger than the sum of its proper divisors (1).

139452737 is an equidigital number, since it uses as much as digits as its factorization.

139452737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 41.

The square root of 139452737 is about 11809.0108391855. The cubic root of 139452737 is about 518.5719409792.

The spelling of 139452737 in words is "one hundred thirty-nine million, four hundred fifty-two thousand, seven hundred thirty-seven".