138670457 has 8 divisors (see below), whose sum is σ = 139826400. Its totient is φ = 137518560.

The previous prime is 138670447. The next prime is 138670463. The reversal of 138670457 is 754076831.

138670457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138670457 - 2²⁴ = 121893241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138670447) 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, 131669 + ... + 132717.

It is an arithmetic number, because the mean of its divisors is an integer number (17478300).

Almost surely, 2^138670457 is an apocalyptic number.

It is an amenable number.

138670457 is a deficient number, since it is larger than the sum of its proper divisors (1155943).

138670457 is a wasteful number, since it uses less digits than its factorization.

138670457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 138670457 is about 11775.8420930310. The cubic root of 138670457 is about 517.6004544113.

The spelling of 138670457 in words is "one hundred thirty-eight million, six hundred seventy thousand, four hundred fifty-seven".