76555813 has 2 divisors, whose sum is σ = 76555814. Its totient is φ = 76555812.

The previous prime is 76555747. The next prime is 76555841. The reversal of 76555813 is 31855567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75742209 + 813604 = 8703^2 + 902^2 .

It is an emirp because it is prime and its reverse (31855567) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76555813 - 2¹³ = 76547621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76552813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38277906 + 38277907.

It is an arithmetic number, because the mean of its divisors is an integer number (38277907).

Almost surely, 2^76555813 is an apocalyptic number.

It is an amenable number.

76555813 is a deficient number, since it is larger than the sum of its proper divisors (1).

76555813 is an equidigital number, since it uses as much as digits as its factorization.

76555813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The square root of 76555813 is about 8749.6178773704. The cubic root of 76555813 is about 424.6124503990.

The spelling of 76555813 in words is "seventy-six million, five hundred fifty-five thousand, eight hundred thirteen".