76999687 has 2 divisors, whose sum is σ = 76999688. Its totient is φ = 76999686.

The previous prime is 76999679. The next prime is 76999693. The reversal of 76999687 is 78699967.

It is a strong prime.

It is an emirp because it is prime and its reverse (78699967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76999687 - 2³ = 76999679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76999697) 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 as a sum of consecutive naturals, namely, 38499843 + 38499844.

It is an arithmetic number, because the mean of its divisors is an integer number (38499844).

Almost surely, 2^76999687 is an apocalyptic number.

76999687 is a deficient number, since it is larger than the sum of its proper divisors (1).

76999687 is an equidigital number, since it uses as much as digits as its factorization.

76999687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10287648, while the sum is 61.

The square root of 76999687 is about 8774.9465525438. The cubic root of 76999687 is about 425.4315100595.

The spelling of 76999687 in words is "seventy-six million, nine hundred ninety-nine thousand, six hundred eighty-seven".