344420389 has 2 divisors, whose sum is σ = 344420390. Its totient is φ = 344420388.

The previous prime is 344420387. The next prime is 344420431. The reversal of 344420389 is 983024443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344399364 + 21025 = 18558^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 344420389 - 2¹ = 344420387 is a prime.

It is a super-2 number, since 2×344420389² = 237250808717822642, which contains 22 as substring.

Together with 344420387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344420381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172210194 + 172210195.

It is an arithmetic number, because the mean of its divisors is an integer number (172210195).

Almost surely, 2^344420389 is an apocalyptic number.

It is an amenable number.

344420389 is a deficient number, since it is larger than the sum of its proper divisors (1).

344420389 is an equidigital number, since it uses as much as digits as its factorization.

344420389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 344420389 is about 18558.5664586465. The cubic root of 344420389 is about 700.9649203075.

The spelling of 344420389 in words is "three hundred forty-four million, four hundred twenty thousand, three hundred eighty-nine".