761138839 has 4 divisors (see below), whose sum is σ = 794231856. Its totient is φ = 728045824.

The previous prime is 761138831. The next prime is 761138849. The reversal of 761138839 is 938831167.

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 761138839 - 2³ = 761138831 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 (761138831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16546474 + ... + 16546519.

It is an arithmetic number, because the mean of its divisors is an integer number (198557964).

Almost surely, 2^761138839 is an apocalyptic number.

761138839 is a deficient number, since it is larger than the sum of its proper divisors (33093017).

761138839 is a wasteful number, since it uses less digits than its factorization.

761138839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33093016.

The product of its digits is 217728, while the sum is 46.

The square root of 761138839 is about 27588.7447884096. The cubic root of 761138839 is about 913.0361251540.

The spelling of 761138839 in words is "seven hundred sixty-one million, one hundred thirty-eight thousand, eight hundred thirty-nine".