347402813 has 2 divisors, whose sum is σ = 347402814. Its totient is φ = 347402812.

The previous prime is 347402807. The next prime is 347402827. The reversal of 347402813 is 318204743.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337897924 + 9504889 = 18382^2 + 3083^2 .

It is an emirp because it is prime and its reverse (318204743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 347402813 - 2¹⁸ = 347140669 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 347402813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (347402113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173701406 + 173701407.

It is an arithmetic number, because the mean of its divisors is an integer number (173701407).

Almost surely, 2^347402813 is an apocalyptic number.

It is an amenable number.

347402813 is a deficient number, since it is larger than the sum of its proper divisors (1).

347402813 is an equidigital number, since it uses as much as digits as its factorization.

347402813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 347402813 is about 18638.7449416531. The cubic root of 347402813 is about 702.9823862278.

The spelling of 347402813 in words is "three hundred forty-seven million, four hundred two thousand, eight hundred thirteen".