345047839 has 2 divisors, whose sum is σ = 345047840. Its totient is φ = 345047838.

The previous prime is 345047831. The next prime is 345047851. The reversal of 345047839 is 938740543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345047839 - 2³ = 345047831 is a prime.

It is a super-2 number, since 2×345047839² = 238116022397139842, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 345047795 and 345047804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345047831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172523919 + 172523920.

It is an arithmetic number, because the mean of its divisors is an integer number (172523920).

Almost surely, 2^345047839 is an apocalyptic number.

345047839 is a deficient number, since it is larger than the sum of its proper divisors (1).

345047839 is an equidigital number, since it uses as much as digits as its factorization.

345047839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 345047839 is about 18575.4633589582. The cubic root of 345047839 is about 701.3903244952.

The spelling of 345047839 in words is "three hundred forty-five million, forty-seven thousand, eight hundred thirty-nine".