76990091 has 2 divisors, whose sum is σ = 76990092. Its totient is φ = 76990090.

The previous prime is 76990061. The next prime is 76990117. The reversal of 76990091 is 19009967.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19009967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76990091 - 2¹⁴ = 76973707 is a prime.

It is a super-2 number, since 2×76990091² = 11854948224376562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76990021) 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, 38495045 + 38495046.

It is an arithmetic number, because the mean of its divisors is an integer number (38495046).

Almost surely, 2^76990091 is an apocalyptic number.

76990091 is a deficient number, since it is larger than the sum of its proper divisors (1).

76990091 is an equidigital number, since it uses as much as digits as its factorization.

76990091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 76990091 is about 8774.3997515500. The cubic root of 76990091 is about 425.4138363496.

The spelling of 76990091 in words is "seventy-six million, nine hundred ninety thousand, ninety-one".