249343932217 has 2 divisors, whose sum is σ = 249343932218. Its totient is φ = 249343932216.

The previous prime is 249343932203. The next prime is 249343932251. The reversal of 249343932217 is 712239343942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208941324201 + 40402608016 = 457101^2 + 201004^2 .

It is a cyclic number.

It is not a de Polignac number, because 249343932217 - 2²⁷ = 249209714489 is a prime.

It is not a weakly prime, because it can be changed into another prime (249343932517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124671966108 + 124671966109.

It is an arithmetic number, because the mean of its divisors is an integer number (124671966109).

Almost surely, 2^249343932217 is an apocalyptic number.

It is an amenable number.

249343932217 is a deficient number, since it is larger than the sum of its proper divisors (1).

249343932217 is an equidigital number, since it uses as much as digits as its factorization.

249343932217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 49.

The spelling of 249343932217 in words is "two hundred forty-nine billion, three hundred forty-three million, nine hundred thirty-two thousand, two hundred seventeen".