345251639 has 2 divisors, whose sum is σ = 345251640. Its totient is φ = 345251638.

The previous prime is 345251617. The next prime is 345251653. The reversal of 345251639 is 936152543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345251639 - 2²⁴ = 328474423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345251239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172625819 + 172625820.

It is an arithmetic number, because the mean of its divisors is an integer number (172625820).

Almost surely, 2^345251639 is an apocalyptic number.

345251639 is a deficient number, since it is larger than the sum of its proper divisors (1).

345251639 is an equidigital number, since it uses as much as digits as its factorization.

345251639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 38.

The square root of 345251639 is about 18580.9482804296. The cubic root of 345251639 is about 701.5283876837.

The spelling of 345251639 in words is "three hundred forty-five million, two hundred fifty-one thousand, six hundred thirty-nine".