345445439 has 2 divisors, whose sum is σ = 345445440. Its totient is φ = 345445438.

The previous prime is 345445333. The next prime is 345445453. The reversal of 345445439 is 934544543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345445439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345445396 and 345445405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345445469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172722719 + 172722720.

It is an arithmetic number, because the mean of its divisors is an integer number (172722720).

Almost surely, 2^345445439 is an apocalyptic number.

345445439 is a deficient number, since it is larger than the sum of its proper divisors (1).

345445439 is an equidigital number, since it uses as much as digits as its factorization.

345445439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 41.

The square root of 345445439 is about 18586.1625678890. The cubic root of 345445439 is about 701.6596260379.

The spelling of 345445439 in words is "three hundred forty-five million, four hundred forty-five thousand, four hundred thirty-nine".