76516991 has 2 divisors, whose sum is σ = 76516992. Its totient is φ = 76516990.

The previous prime is 76516981. The next prime is 76517011. The reversal of 76516991 is 19961567.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19961567) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76516991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76516961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38258495 + 38258496.

It is an arithmetic number, because the mean of its divisors is an integer number (38258496).

Almost surely, 2^76516991 is an apocalyptic number.

76516991 is a deficient number, since it is larger than the sum of its proper divisors (1).

76516991 is an equidigital number, since it uses as much as digits as its factorization.

76516991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 44.

The square root of 76516991 is about 8747.3990991608. The cubic root of 76516991 is about 424.5406635935.

The spelling of 76516991 in words is "seventy-six million, five hundred sixteen thousand, nine hundred ninety-one".