139811757 has 16 divisors (see below), whose sum is σ = 199765440. Its totient is φ = 86665472.

The previous prime is 139811753. The next prime is 139811807. The reversal of 139811757 is 757118931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 139811757 - 2² = 139811753 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139811753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12282 + ... + 20747.

It is an arithmetic number, because the mean of its divisors is an integer number (12485340).

Almost surely, 2^139811757 is an apocalyptic number.

139811757 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

139811757 is a deficient number, since it is larger than the sum of its proper divisors (59953683).

139811757 is a wasteful number, since it uses less digits than its factorization.

139811757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33132.

The product of its digits is 52920, while the sum is 42.

The square root of 139811757 is about 11824.2021718169. The cubic root of 139811757 is about 519.0165794504.

The spelling of 139811757 in words is "one hundred thirty-nine million, eight hundred eleven thousand, seven hundred fifty-seven".