344869991 has 2 divisors, whose sum is σ = 344869992. Its totient is φ = 344869990.

The previous prime is 344869949. The next prime is 344870003. The reversal of 344869991 is 199968443.

It is a strong prime.

It is an emirp because it is prime and its reverse (199968443) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344869991 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 (344869891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172434995 + 172434996.

It is an arithmetic number, because the mean of its divisors is an integer number (172434996).

Almost surely, 2^344869991 is an apocalyptic number.

344869991 is a deficient number, since it is larger than the sum of its proper divisors (1).

344869991 is an equidigital number, since it uses as much as digits as its factorization.

344869991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 53.

The square root of 344869991 is about 18570.6755666023. The cubic root of 344869991 is about 701.2697979186.

The spelling of 344869991 in words is "three hundred forty-four million, eight hundred sixty-nine thousand, nine hundred ninety-one".