139741657 has 8 divisors (see below), whose sum is σ = 152802720. Its totient is φ = 126740160.

The previous prime is 139741643. The next prime is 139741661. The reversal of 139741657 is 756147931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139741657 is a prime.

It is a super-2 number, since 2×139741657² = 39055461402211298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139741687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9907 + ... + 19432.

It is an arithmetic number, because the mean of its divisors is an integer number (19100340).

Almost surely, 2^139741657 is an apocalyptic number.

It is an amenable number.

139741657 is a deficient number, since it is larger than the sum of its proper divisors (13061063).

139741657 is a wasteful number, since it uses less digits than its factorization.

139741657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29783.

The product of its digits is 158760, while the sum is 43.

The square root of 139741657 is about 11821.2375409684. The cubic root of 139741657 is about 518.9298219764.

The spelling of 139741657 in words is "one hundred thirty-nine million, seven hundred forty-one thousand, six hundred fifty-seven".