249420599993 has 2 divisors, whose sum is σ = 249420599994. Its totient is φ = 249420599992.

The previous prime is 249420599971. The next prime is 249420600007. The reversal of 249420599993 is 399995024942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209175425449 + 40245174544 = 457357^2 + 200612^2 .

It is a cyclic number.

It is not a de Polignac number, because 249420599993 - 2²⁴ = 249403822777 is a prime.

It is a super-2 number, since 2×249420599993² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (249420599293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124710299996 + 124710299997.

It is an arithmetic number, because the mean of its divisors is an integer number (124710299997).

Almost surely, 2^249420599993 is an apocalyptic number.

It is an amenable number.

249420599993 is a deficient number, since it is larger than the sum of its proper divisors (1).

249420599993 is an equidigital number, since it uses as much as digits as its factorization.

249420599993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56687040, while the sum is 65.

The spelling of 249420599993 in words is "two hundred forty-nine billion, four hundred twenty million, five hundred ninety-nine thousand, nine hundred ninety-three".