308494091 has 2 divisors, whose sum is σ = 308494092. Its totient is φ = 308494090.

The previous prime is 308494061. The next prime is 308494093. The reversal of 308494091 is 190494803.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 308494091 - 2¹⁴ = 308477707 is a prime.

Together with 308494093, 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 (308494093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154247045 + 154247046.

It is an arithmetic number, because the mean of its divisors is an integer number (154247046).

Almost surely, 2^308494091 is an apocalyptic number.

308494091 is a deficient number, since it is larger than the sum of its proper divisors (1).

308494091 is an equidigital number, since it uses as much as digits as its factorization.

308494091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 308494091 is about 17563.9998576634. Note that the first 3 decimals coincide. The cubic root of 308494091 is about 675.6922690184.

The spelling of 308494091 in words is "three hundred eight million, four hundred ninety-four thousand, ninety-one".