138276793 has 4 divisors (see below), whose sum is σ = 146410740. Its totient is φ = 130142848.

The previous prime is 138276763. The next prime is 138276799. The reversal of 138276793 is 397672831.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 130028409 + 8248384 = 11403^2 + 2872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138276793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138276799) 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, 4066948 + ... + 4066981.

It is an arithmetic number, because the mean of its divisors is an integer number (36602685).

Almost surely, 2^138276793 is an apocalyptic number.

It is an amenable number.

138276793 is a deficient number, since it is larger than the sum of its proper divisors (8133947).

138276793 is an equidigital number, since it uses as much as digits as its factorization.

138276793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8133946.

The product of its digits is 381024, while the sum is 46.

The square root of 138276793 is about 11759.1153153628. The cubic root of 138276793 is about 517.1101942906.

The spelling of 138276793 in words is "one hundred thirty-eight million, two hundred seventy-six thousand, seven hundred ninety-three".