345023491 has 2 divisors, whose sum is σ = 345023492. Its totient is φ = 345023490.

The previous prime is 345023461. The next prime is 345023501. The reversal of 345023491 is 194320543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345023491 is a prime.

It is not a weakly prime, because it can be changed into another prime (345023431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172511745 + 172511746.

It is an arithmetic number, because the mean of its divisors is an integer number (172511746).

Almost surely, 2^345023491 is an apocalyptic number.

345023491 is a deficient number, since it is larger than the sum of its proper divisors (1).

345023491 is an equidigital number, since it uses as much as digits as its factorization.

345023491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 345023491 is about 18574.8079667059. The cubic root of 345023491 is about 701.3738264415.

The spelling of 345023491 in words is "three hundred forty-five million, twenty-three thousand, four hundred ninety-one".