345031091 has 2 divisors, whose sum is σ = 345031092. Its totient is φ = 345031090.

The previous prime is 345031087. The next prime is 345031111. The reversal of 345031091 is 190130543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345031091 - 2² = 345031087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345031091.

It is not a weakly prime, because it can be changed into another prime (345031021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172515545 + 172515546.

It is an arithmetic number, because the mean of its divisors is an integer number (172515546).

Almost surely, 2^345031091 is an apocalyptic number.

345031091 is a deficient number, since it is larger than the sum of its proper divisors (1).

345031091 is an equidigital number, since it uses as much as digits as its factorization.

345031091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 345031091 is about 18575.0125437374. The cubic root of 345031091 is about 701.3789762376.

The spelling of 345031091 in words is "three hundred forty-five million, thirty-one thousand, ninety-one".