139452757 has 2 divisors, whose sum is σ = 139452758. Its totient is φ = 139452756.

The previous prime is 139452743. The next prime is 139452763. The reversal of 139452757 is 757254931.

139452757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120868036 + 18584721 = 10994^2 + 4311^2 .

It is a cyclic number.

It is not a de Polignac number, because 139452757 - 2⁷ = 139452629 is a prime.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69726378 + 69726379.

It is an arithmetic number, because the mean of its divisors is an integer number (69726379).

Almost surely, 2^139452757 is an apocalyptic number.

It is an amenable number.

139452757 is a deficient number, since it is larger than the sum of its proper divisors (1).

139452757 is an equidigital number, since it uses as much as digits as its factorization.

139452757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 43.

The square root of 139452757 is about 11809.0116859964. The cubic root of 139452757 is about 518.5719657700.

The spelling of 139452757 in words is "one hundred thirty-nine million, four hundred fifty-two thousand, seven hundred fifty-seven".