76621231 has 4 divisors (see below), whose sum is σ = 77591200. Its totient is φ = 75651264.

The previous prime is 76621217. The next prime is 76621241. The reversal of 76621231 is 13212667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13212667 = 13 ⋅1016359.

It is a cyclic number.

It is not a de Polignac number, because 76621231 - 2¹¹ = 76619183 is a prime.

It is a super-2 number, since 2×76621231² = 11741626079910722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76621231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76621241) 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 3 ways as a sum of consecutive naturals, for example, 484866 + ... + 485023.

It is an arithmetic number, because the mean of its divisors is an integer number (19397800).

Almost surely, 2^76621231 is an apocalyptic number.

76621231 is a deficient number, since it is larger than the sum of its proper divisors (969969).

76621231 is an equidigital number, since it uses as much as digits as its factorization.

76621231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969968.

The product of its digits is 3024, while the sum is 28.

The square root of 76621231 is about 8753.3554137828. The cubic root of 76621231 is about 424.7333617007.

Adding to 76621231 its reverse (13212667), we get a palindrome (89833898).

The spelling of 76621231 in words is "seventy-six million, six hundred twenty-one thousand, two hundred thirty-one".