320230091 has 2 divisors, whose sum is σ = 320230092. Its totient is φ = 320230090.

The previous prime is 320230063. The next prime is 320230103. The reversal of 320230091 is 190032023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320230091 is a prime.

It is a super-2 number, since 2×320230091² = 205094622363736562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320230021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160115045 + 160115046.

It is an arithmetic number, because the mean of its divisors is an integer number (160115046).

Almost surely, 2^320230091 is an apocalyptic number.

320230091 is a deficient number, since it is larger than the sum of its proper divisors (1).

320230091 is an equidigital number, since it uses as much as digits as its factorization.

320230091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 320230091 is about 17894.9739033059. The cubic root of 320230091 is about 684.1542769256.

The spelling of 320230091 in words is "three hundred twenty million, two hundred thirty thousand, ninety-one".