345927999 has 4 divisors (see below), whose sum is σ = 461237336. Its totient is φ = 230618664.

The previous prime is 345927997. The next prime is 345928001. The reversal of 345927999 is 999729543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999729543 = 3 ⋅333243181.

It is an interprime number because it is at equal distance from previous prime (345927997) and next prime (345928001).

It is not a de Polignac number, because 345927999 - 2¹ = 345927997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345927997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57654664 + ... + 57654669.

It is an arithmetic number, because the mean of its divisors is an integer number (115309334).

Almost surely, 2^345927999 is an apocalyptic number.

345927999 is a deficient number, since it is larger than the sum of its proper divisors (115309337).

345927999 is a wasteful number, since it uses less digits than its factorization.

345927999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115309336.

The product of its digits is 5511240, while the sum is 57.

The square root of 345927999 is about 18599.1397381707. The cubic root of 345927999 is about 701.9861950516.

The spelling of 345927999 in words is "three hundred forty-five million, nine hundred twenty-seven thousand, nine hundred ninety-nine".