76645091 has 2 divisors, whose sum is σ = 76645092. Its totient is φ = 76645090.

The previous prime is 76645067. The next prime is 76645103. The reversal of 76645091 is 19054667.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76645091 - 2¹⁸ = 76382947 is a prime.

It is not a weakly prime, because it can be changed into another prime (76645001) 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, 38322545 + 38322546.

It is an arithmetic number, because the mean of its divisors is an integer number (38322546).

Almost surely, 2^76645091 is an apocalyptic number.

76645091 is a deficient number, since it is larger than the sum of its proper divisors (1).

76645091 is an equidigital number, since it uses as much as digits as its factorization.

76645091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 76645091 is about 8754.7182136263. The cubic root of 76645091 is about 424.7774447228. Note that the first 3 decimals are identical.

The spelling of 76645091 in words is "seventy-six million, six hundred forty-five thousand, ninety-one".