345274819 has 2 divisors, whose sum is σ = 345274820. Its totient is φ = 345274818.

The previous prime is 345274747. The next prime is 345274829. The reversal of 345274819 is 918472543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345274819 is a prime.

It is a super-2 number, since 2×345274819² = 238429401270965522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345274829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172637409 + 172637410.

It is an arithmetic number, because the mean of its divisors is an integer number (172637410).

Almost surely, 2^345274819 is an apocalyptic number.

345274819 is a deficient number, since it is larger than the sum of its proper divisors (1).

345274819 is an equidigital number, since it uses as much as digits as its factorization.

345274819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 345274819 is about 18581.5720271456. The cubic root of 345274819 is about 701.5440874055.

The spelling of 345274819 in words is "three hundred forty-five million, two hundred seventy-four thousand, eight hundred nineteen".