344867981 has 2 divisors, whose sum is σ = 344867982. Its totient is φ = 344867980.

The previous prime is 344867959. The next prime is 344867983. The reversal of 344867981 is 189768443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197852356 + 147015625 = 14066^2 + 12125^2 .

It is an emirp because it is prime and its reverse (189768443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 344867981 - 2¹⁰ = 344866957 is a prime.

It is a super-2 number, since 2×344867981² = 237867848638032722, which contains 22 as substring.

Together with 344867983, 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 (344867983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172433990 + 172433991.

It is an arithmetic number, because the mean of its divisors is an integer number (172433991).

Almost surely, 2^344867981 is an apocalyptic number.

It is an amenable number.

344867981 is a deficient number, since it is larger than the sum of its proper divisors (1).

344867981 is an equidigital number, since it uses as much as digits as its factorization.

344867981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 344867981 is about 18570.6214489446. The cubic root of 344867981 is about 701.2684355163.

The spelling of 344867981 in words is "three hundred forty-four million, eight hundred sixty-seven thousand, nine hundred eighty-one".