76490861 has 2 divisors, whose sum is σ = 76490862. Its totient is φ = 76490860.

The previous prime is 76490849. The next prime is 76490923. The reversal of 76490861 is 16809467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57078025 + 19412836 = 7555^2 + 4406^2 .

It is a cyclic number.

It is not a de Polignac number, because 76490861 - 2⁶ = 76490797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76490261) 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, 38245430 + 38245431.

It is an arithmetic number, because the mean of its divisors is an integer number (38245431).

Almost surely, 2^76490861 is an apocalyptic number.

It is an amenable number.

76490861 is a deficient number, since it is larger than the sum of its proper divisors (1).

76490861 is an equidigital number, since it uses as much as digits as its factorization.

76490861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 76490861 is about 8745.9053848072. The cubic root of 76490861 is about 424.4923322343.

The spelling of 76490861 in words is "seventy-six million, four hundred ninety thousand, eight hundred sixty-one".