344746639 has 2 divisors, whose sum is σ = 344746640. Its totient is φ = 344746638.

The previous prime is 344746637. The next prime is 344746667. The reversal of 344746639 is 936647443.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 344746639 - 2¹ = 344746637 is a prime.

Together with 344746637, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344746637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172373319 + 172373320.

It is an arithmetic number, because the mean of its divisors is an integer number (172373320).

Almost surely, 2^344746639 is an apocalyptic number.

344746639 is a deficient number, since it is larger than the sum of its proper divisors (1).

344746639 is an equidigital number, since it uses as much as digits as its factorization.

344746639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 46.

The square root of 344746639 is about 18567.3541195293. The cubic root of 344746639 is about 701.1861786323.

It can be divided in two parts, 3447 and 46639, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 344746639 in words is "three hundred forty-four million, seven hundred forty-six thousand, six hundred thirty-nine".