345997427 has 2 divisors, whose sum is σ = 345997428. Its totient is φ = 345997426.

The previous prime is 345997367. The next prime is 345997451. The reversal of 345997427 is 724799543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345997427 - 2²² = 341803123 is a prime.

It is not a weakly prime, because it can be changed into another prime (345397427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172998713 + 172998714.

It is an arithmetic number, because the mean of its divisors is an integer number (172998714).

Almost surely, 2^345997427 is an apocalyptic number.

345997427 is a deficient number, since it is larger than the sum of its proper divisors (1).

345997427 is an equidigital number, since it uses as much as digits as its factorization.

345997427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 50.

The square root of 345997427 is about 18601.0060749412. The cubic root of 345997427 is about 702.0331549561.

The spelling of 345997427 in words is "three hundred forty-five million, nine hundred ninety-seven thousand, four hundred twenty-seven".