138757757 has 8 divisors (see below), whose sum is σ = 147744000. Its totient is φ = 129863104.

The previous prime is 138757711. The next prime is 138757769. The reversal of 138757757 is 757757831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138757757 - 2⁶ = 138757693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138757777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19757 + ... + 25842.

It is an arithmetic number, because the mean of its divisors is an integer number (18468000).

Almost surely, 2^138757757 is an apocalyptic number.

138757757 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138757757 is a deficient number, since it is larger than the sum of its proper divisors (8986243).

138757757 is a wasteful number, since it uses less digits than its factorization.

138757757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45795.

The product of its digits is 1440600, while the sum is 50.

The square root of 138757757 is about 11779.5482511003. The cubic root of 138757757 is about 517.7090500982.

The spelling of 138757757 in words is "one hundred thirty-eight million, seven hundred fifty-seven thousand, seven hundred fifty-seven".