138556707 has 8 divisors (see below), whose sum is σ = 189038784. Its totient is φ = 90222888.

The previous prime is 138556703. The next prime is 138556709. The reversal of 138556707 is 707655831.

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

It is not a de Polignac number, because 138556707 - 2² = 138556703 is a prime.

It is a super-2 number, since 2×138556707² = 38395922109367698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138556703) 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, 536913 + ... + 537170.

It is an arithmetic number, because the mean of its divisors is an integer number (23629848).

Almost surely, 2^138556707 is an apocalyptic number.

138556707 is a deficient number, since it is larger than the sum of its proper divisors (50482077).

138556707 is a wasteful number, since it uses less digits than its factorization.

138556707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074129.

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 138556707 is about 11771.0112989496. The cubic root of 138556707 is about 517.4588881901.

The spelling of 138556707 in words is "one hundred thirty-eight million, five hundred fifty-six thousand, seven hundred seven".