138456975 has 12 divisors (see below), whose sum is σ = 228915656. Its totient is φ = 73843680.

The previous prime is 138456973. The next prime is 138456977. The reversal of 138456975 is 579654831.

It is an interprime number because it is at equal distance from previous prime (138456973) and next prime (138456977).

It is not a de Polignac number, because 138456975 - 2¹ = 138456973 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 (138456973) 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 11 ways as a sum of consecutive naturals, for example, 922972 + ... + 923121.

Almost surely, 2^138456975 is an apocalyptic number.

138456975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138456975 is a deficient number, since it is larger than the sum of its proper divisors (90458681).

138456975 is a wasteful number, since it uses less digits than its factorization.

138456975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846106 (or 1846101 counting only the distinct ones).

The product of its digits is 907200, while the sum is 48.

The square root of 138456975 is about 11766.7741968647. The cubic root of 138456975 is about 517.3347041452.

The spelling of 138456975 in words is "one hundred thirty-eight million, four hundred fifty-six thousand, nine hundred seventy-five".