7990091 has 2 divisors, whose sum is σ = 7990092. Its totient is φ = 7990090.

The previous prime is 7990079. The next prime is 7990093. The reversal of 7990091 is 1900997.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7990091 - 2¹⁰ = 7989067 is a prime.

Together with 7990093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7990093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995045 + 3995046.

It is an arithmetic number, because the mean of its divisors is an integer number (3995046).

Almost surely, 2^7990091 is an apocalyptic number.

7990091 is a deficient number, since it is larger than the sum of its proper divisors (1).

7990091 is an equidigital number, since it uses as much as digits as its factorization.

7990091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 7990091 is about 2826.6749017176. The cubic root of 7990091 is about 199.9173908834.

The spelling of 7990091 in words is "seven million, nine hundred ninety thousand, ninety-one".