345070639 has 2 divisors, whose sum is σ = 345070640. Its totient is φ = 345070638.

The previous prime is 345070631. The next prime is 345070643. The reversal of 345070639 is 936070543.

It is a strong prime.

It is an emirp because it is prime and its reverse (936070543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345070639 - 2³ = 345070631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345070598 and 345070607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345070631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172535319 + 172535320.

It is an arithmetic number, because the mean of its divisors is an integer number (172535320).

Almost surely, 2^345070639 is an apocalyptic number.

345070639 is a deficient number, since it is larger than the sum of its proper divisors (1).

345070639 is an equidigital number, since it uses as much as digits as its factorization.

345070639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 345070639 is about 18576.0770616403. The cubic root of 345070639 is about 701.4057729300.

The spelling of 345070639 in words is "three hundred forty-five million, seventy thousand, six hundred thirty-nine".