76890647 has 2 divisors, whose sum is σ = 76890648. Its totient is φ = 76890646.

The previous prime is 76890617. The next prime is 76890659. The reversal of 76890647 is 74609867.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76890647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76890617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38445323 + 38445324.

It is an arithmetic number, because the mean of its divisors is an integer number (38445324).

Almost surely, 2^76890647 is an apocalyptic number.

76890647 is a deficient number, since it is larger than the sum of its proper divisors (1).

76890647 is an equidigital number, since it uses as much as digits as its factorization.

76890647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 76890647 is about 8768.7312081053. The cubic root of 76890647 is about 425.2305959682.

The spelling of 76890647 in words is "seventy-six million, eight hundred ninety thousand, six hundred forty-seven".