138794651 has 4 divisors (see below), whose sum is σ = 141413472. Its totient is φ = 136175832.

The previous prime is 138794641. The next prime is 138794693. The reversal of 138794651 is 156497831.

138794651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138794651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138794641) 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, 1309331 + ... + 1309436.

It is an arithmetic number, because the mean of its divisors is an integer number (35353368).

Almost surely, 2^138794651 is an apocalyptic number.

138794651 is a deficient number, since it is larger than the sum of its proper divisors (2618821).

138794651 is an equidigital number, since it uses as much as digits as its factorization.

138794651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618820.

The product of its digits is 181440, while the sum is 44.

The square root of 138794651 is about 11781.1141663257. The cubic root of 138794651 is about 517.7549302121.

The spelling of 138794651 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, six hundred fifty-one".