76511381 has 2 divisors, whose sum is σ = 76511382. Its totient is φ = 76511380.

The previous prime is 76511359. The next prime is 76511399. The reversal of 76511381 is 18311567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60310756 + 16200625 = 7766^2 + 4025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76511381 is a prime.

It is a super-2 number, since 2×76511381² = 11707982845054322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76511311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38255690 + 38255691.

It is an arithmetic number, because the mean of its divisors is an integer number (38255691).

Almost surely, 2^76511381 is an apocalyptic number.

It is an amenable number.

76511381 is a deficient number, since it is larger than the sum of its proper divisors (1).

76511381 is an equidigital number, since it uses as much as digits as its factorization.

76511381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 76511381 is about 8747.0784265376. The cubic root of 76511381 is about 424.5302879837.

The spelling of 76511381 in words is "seventy-six million, five hundred eleven thousand, three hundred eighty-one".