76887491 has 2 divisors, whose sum is σ = 76887492. Its totient is φ = 76887490.

The previous prime is 76887479. The next prime is 76887521. The reversal of 76887491 is 19478867.

It is a weak prime.

It is an emirp because it is prime and its reverse (19478867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76887491 - 2¹⁴ = 76871107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76887691) 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, 38443745 + 38443746.

It is an arithmetic number, because the mean of its divisors is an integer number (38443746).

Almost surely, 2^76887491 is an apocalyptic number.

76887491 is a deficient number, since it is larger than the sum of its proper divisors (1).

76887491 is an equidigital number, since it uses as much as digits as its factorization.

76887491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 50.

The square root of 76887491 is about 8768.5512486385. The cubic root of 76887491 is about 425.2247779822.

The spelling of 76887491 in words is "seventy-six million, eight hundred eighty-seven thousand, four hundred ninety-one".