138775051 has 4 divisors (see below), whose sum is σ = 138947400. Its totient is φ = 138602704.

The previous prime is 138775009. The next prime is 138775057. The reversal of 138775051 is 150577831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138775051 - 2⁹ = 138774539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138775051.

It is not an unprimeable number, because it can be changed into a prime (138775057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84961 + ... + 86578.

It is an arithmetic number, because the mean of its divisors is an integer number (34736850).

Almost surely, 2^138775051 is an apocalyptic number.

138775051 is a deficient number, since it is larger than the sum of its proper divisors (172349).

138775051 is an equidigital number, since it uses as much as digits as its factorization.

138775051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172348.

The product of its (nonzero) digits is 29400, while the sum is 37.

The square root of 138775051 is about 11780.2822971268. The cubic root of 138775051 is about 517.7305573364.

The spelling of 138775051 in words is "one hundred thirty-eight million, seven hundred seventy-five thousand, fifty-one".