76990687 has 2 divisors, whose sum is σ = 76990688. Its totient is φ = 76990686.

The previous prime is 76990657. The next prime is 76990699. The reversal of 76990687 is 78609967.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76990687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76990657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38495343 + 38495344.

It is an arithmetic number, because the mean of its divisors is an integer number (38495344).

Almost surely, 2^76990687 is an apocalyptic number.

76990687 is a deficient number, since it is larger than the sum of its proper divisors (1).

76990687 is an equidigital number, since it uses as much as digits as its factorization.

76990687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 76990687 is about 8774.4337139214. The cubic root of 76990687 is about 425.4149340926.

It can be divided in two parts, 76990 and 687, that added together give a palindrome (77677).

The spelling of 76990687 in words is "seventy-six million, nine hundred ninety thousand, six hundred eighty-seven".