304090091 has 2 divisors, whose sum is σ = 304090092. Its totient is φ = 304090090.

The previous prime is 304090069. The next prime is 304090147. The reversal of 304090091 is 190090403.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (190090403) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304090091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 304090091.

It is not a weakly prime, because it can be changed into another prime (304090001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152045045 + 152045046.

It is an arithmetic number, because the mean of its divisors is an integer number (152045046).

Almost surely, 2^304090091 is an apocalyptic number.

304090091 is a deficient number, since it is larger than the sum of its proper divisors (1).

304090091 is an equidigital number, since it uses as much as digits as its factorization.

304090091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 304090091 is about 17438.1791193920. The cubic root of 304090091 is about 672.4614966693.

The spelling of 304090091 in words is "three hundred four million, ninety thousand, ninety-one".