344872813 has 2 divisors, whose sum is σ = 344872814. Its totient is φ = 344872812.

The previous prime is 344872807. The next prime is 344872817. The reversal of 344872813 is 318278443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235837449 + 109035364 = 15357^2 + 10442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344872813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344872817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172436406 + 172436407.

It is an arithmetic number, because the mean of its divisors is an integer number (172436407).

Almost surely, 2^344872813 is an apocalyptic number.

It is an amenable number.

344872813 is a deficient number, since it is larger than the sum of its proper divisors (1).

344872813 is an equidigital number, since it uses as much as digits as its factorization.

344872813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 40.

The square root of 344872813 is about 18570.7515464507. The cubic root of 344872813 is about 701.2717106955.

The spelling of 344872813 in words is "three hundred forty-four million, eight hundred seventy-two thousand, eight hundred thirteen".