76621331 has 4 divisors (see below), whose sum is σ = 76849032. Its totient is φ = 76393632.

The previous prime is 76621291. The next prime is 76621343. The reversal of 76621331 is 13312667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13312667 = 1319 ⋅10093.

It is a cyclic number.

It is not a de Polignac number, because 76621331 - 2¹⁰ = 76620307 is a prime.

It is a super-2 number, since 2×76621331² = 11741656728423122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76621294 and 76621303.

It is not an unprimeable number, because it can be changed into a prime (76621031) 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, 113345 + ... + 114018.

It is an arithmetic number, because the mean of its divisors is an integer number (19212258).

Almost surely, 2^76621331 is an apocalyptic number.

76621331 is a deficient number, since it is larger than the sum of its proper divisors (227701).

76621331 is a wasteful number, since it uses less digits than its factorization.

76621331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227700.

The product of its digits is 4536, while the sum is 29.

The square root of 76621331 is about 8753.3611258762. The cubic root of 76621331 is about 424.7335464768.

Adding to 76621331 its reverse (13312667), we get a palindrome (89933998).

The spelling of 76621331 in words is "seventy-six million, six hundred twenty-one thousand, three hundred thirty-one".