77130331 has 2 divisors, whose sum is σ = 77130332. Its totient is φ = 77130330.

The previous prime is 77130299. The next prime is 77130341. The reversal of 77130331 is 13303177.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77130331 - 2⁵ = 77130299 is a prime.

It is a super-5 number, since 5×77130331⁵ (a number of 41 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 77130296 and 77130305.

It is not a weakly prime, because it can be changed into another prime (77130341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38565165 + 38565166.

It is an arithmetic number, because the mean of its divisors is an integer number (38565166).

Almost surely, 2^77130331 is an apocalyptic number.

77130331 is a deficient number, since it is larger than the sum of its proper divisors (1).

77130331 is an equidigital number, since it uses as much as digits as its factorization.

77130331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323, while the sum is 25.

The square root of 77130331 is about 8782.3875455368. The cubic root of 77130331 is about 425.6719814694.

The spelling of 77130331 in words is "seventy-seven million, one hundred thirty thousand, three hundred thirty-one".