76393891 has 6 divisors (see below), whose sum is σ = 88866420. Its totient is φ = 65480436.

The previous prime is 76393883. The next prime is 76393897. The reversal of 76393891 is 19839367.

It is not a de Polignac number, because 76393891 - 2³ = 76393883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76393897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 779481 + ... + 779578.

It is an arithmetic number, because the mean of its divisors is an integer number (14811070).

Almost surely, 2^76393891 is an apocalyptic number.

76393891 is a deficient number, since it is larger than the sum of its proper divisors (12472529).

76393891 is a wasteful number, since it uses less digits than its factorization.

76393891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559073 (or 1559066 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The square root of 76393891 is about 8740.3598896155. The cubic root of 76393891 is about 424.3128753783.

It can be divided in two parts, 76393 and 891, that added together give a square (77284 = 278²).

The spelling of 76393891 in words is "seventy-six million, three hundred ninety-three thousand, eight hundred ninety-one".