139490757 has 24 divisors (see below), whose sum is σ = 231154560. Its totient is φ = 79403040.

The previous prime is 139490749. The next prime is 139490773. The reversal of 139490757 is 757094931.

It is not a de Polignac number, because 139490757 - 2³ = 139490749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139490707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12832 + ... + 21062.

It is an arithmetic number, because the mean of its divisors is an integer number (9631440).

Almost surely, 2^139490757 is an apocalyptic number.

It is an amenable number.

139490757 is a deficient number, since it is larger than the sum of its proper divisors (91663803).

139490757 is a wasteful number, since it uses less digits than its factorization.

139490757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8513 (or 8510 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 139490757 is about 11810.6205171447. The cubic root of 139490757 is about 518.6190640263.

The spelling of 139490757 in words is "one hundred thirty-nine million, four hundred ninety thousand, seven hundred fifty-seven".