345394639 has 2 divisors, whose sum is σ = 345394640. Its totient is φ = 345394638.

The previous prime is 345394631. The next prime is 345394697. The reversal of 345394639 is 936493543.

It is a weak prime.

It is an emirp because it is prime and its reverse (936493543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345394639 - 2³ = 345394631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345394631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172697319 + 172697320.

It is an arithmetic number, because the mean of its divisors is an integer number (172697320).

Almost surely, 2^345394639 is an apocalyptic number.

345394639 is a deficient number, since it is larger than the sum of its proper divisors (1).

345394639 is an equidigital number, since it uses as much as digits as its factorization.

345394639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 46.

The square root of 345394639 is about 18584.7959095601. The cubic root of 345394639 is about 701.6252298137.

The spelling of 345394639 in words is "three hundred forty-five million, three hundred ninety-four thousand, six hundred thirty-nine".