138794761 has 4 divisors (see below), whose sum is σ = 158622592. Its totient is φ = 118966932.

The previous prime is 138794743. The next prime is 138794779. The reversal of 138794761 is 167497831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (138794743) and next prime (138794779).

It is not a de Polignac number, because 138794761 - 2⁷ = 138794633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138794731) 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, 9913905 + ... + 9913918.

It is an arithmetic number, because the mean of its divisors is an integer number (39655648).

Almost surely, 2^138794761 is an apocalyptic number.

It is an amenable number.

138794761 is a deficient number, since it is larger than the sum of its proper divisors (19827831).

138794761 is an equidigital number, since it uses as much as digits as its factorization.

138794761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19827830.

The product of its digits is 254016, while the sum is 46.

The square root of 138794761 is about 11781.1188348136. The cubic root of 138794761 is about 517.7550669922.

The spelling of 138794761 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, seven hundred sixty-one".