76221369 has 48 divisors (see below), whose sum is σ = 136106880. Its totient is φ = 40124160.

The previous prime is 76221349. The next prime is 76221373. The reversal of 76221369 is 96312267.

76221369 is a `hidden beast` number, since 76 + 221 + 369 = 666.

It is not a de Polignac number, because 76221369 - 2²⁴ = 59444153 is a prime.

It is a super-2 number, since 2×76221369² = 11619394184468322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (76221349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43429 + ... + 45149.

It is an arithmetic number, because the mean of its divisors is an integer number (2835560).

Almost surely, 2^76221369 is an apocalyptic number.

It is an amenable number.

76221369 is a deficient number, since it is larger than the sum of its proper divisors (59885511).

76221369 is a wasteful number, since it uses less digits than its factorization.

76221369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 1787 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 76221369 is about 8730.4850380721. The cubic root of 76221369 is about 423.9932229396.

It can be divided in two parts, 76 and 221369, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 76221369 in words is "seventy-six million, two hundred twenty-one thousand, three hundred sixty-nine".