348936393721 has 2 divisors, whose sum is σ = 348936393722. Its totient is φ = 348936393720.

The previous prime is 348936393667. The next prime is 348936393803. The reversal of 348936393721 is 127393639843.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258597675625 + 90338718096 = 508525^2 + 300564^2 .

It is a cyclic number.

It is not a de Polignac number, because 348936393721 - 2²⁷ = 348802175993 is a prime.

It is not a weakly prime, because it can be changed into another prime (348936393521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174468196860 + 174468196861.

It is an arithmetic number, because the mean of its divisors is an integer number (174468196861).

Almost surely, 2^348936393721 is an apocalyptic number.

It is an amenable number.

348936393721 is a deficient number, since it is larger than the sum of its proper divisors (1).

348936393721 is an equidigital number, since it uses as much as digits as its factorization.

348936393721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 58.

The spelling of 348936393721 in words is "three hundred forty-eight billion, nine hundred thirty-six million, three hundred ninety-three thousand, seven hundred twenty-one".