138264657 has 16 divisors (see below), whose sum is σ = 186759552. Its totient is φ = 90979200.

The previous prime is 138264631. The next prime is 138264677. The reversal of 138264657 is 756462831.

It is not a de Polignac number, because 138264657 - 2⁶ = 138264593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138264677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147093 + ... + 148029.

It is an arithmetic number, because the mean of its divisors is an integer number (11672472).

Almost surely, 2^138264657 is an apocalyptic number.

It is an amenable number.

138264657 is a deficient number, since it is larger than the sum of its proper divisors (48494895).

138264657 is a wasteful number, since it uses less digits than its factorization.

138264657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528.

The product of its digits is 241920, while the sum is 42.

The square root of 138264657 is about 11758.5992788257. The cubic root of 138264657 is about 517.0950656181.

The spelling of 138264657 in words is "one hundred thirty-eight million, two hundred sixty-four thousand, six hundred fifty-seven".