345504139 has 2 divisors, whose sum is σ = 345504140. Its totient is φ = 345504138.

The previous prime is 345504121. The next prime is 345504149. The reversal of 345504139 is 931405543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345504139 - 2²⁵ = 311949707 is a prime.

It is a super-2 number, since 2×345504139² = 238746220132262642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345504119) 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 as a sum of consecutive naturals, namely, 172752069 + 172752070.

It is an arithmetic number, because the mean of its divisors is an integer number (172752070).

Almost surely, 2^345504139 is an apocalyptic number.

345504139 is a deficient number, since it is larger than the sum of its proper divisors (1).

345504139 is an equidigital number, since it uses as much as digits as its factorization.

345504139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 345504139 is about 18587.7416325922. The cubic root of 345504139 is about 701.6993670821.

The spelling of 345504139 in words is "three hundred forty-five million, five hundred four thousand, one hundred thirty-nine".