344447989 has 2 divisors, whose sum is σ = 344447990. Its totient is φ = 344447988.

The previous prime is 344447963. The next prime is 344448031. The reversal of 344447989 is 989744443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202123089 + 142324900 = 14217^2 + 11930^2 .

It is an emirp because it is prime and its reverse (989744443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 344447989 - 2¹⁵ = 344415221 is a prime.

It is a super-2 number, since 2×344447989² = 237288834252288242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344427989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172223994 + 172223995.

It is an arithmetic number, because the mean of its divisors is an integer number (172223995).

Almost surely, 2^344447989 is an apocalyptic number.

It is an amenable number.

344447989 is a deficient number, since it is larger than the sum of its proper divisors (1).

344447989 is an equidigital number, since it uses as much as digits as its factorization.

344447989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 52.

The square root of 344447989 is about 18559.3100356667. The cubic root of 344447989 is about 700.9836436620.

The spelling of 344447989 in words is "three hundred forty-four million, four hundred forty-seven thousand, nine hundred eighty-nine".