249243413 has 2 divisors, whose sum is σ = 249243414. Its totient is φ = 249243412.

The previous prime is 249243391. The next prime is 249243427. The reversal of 249243413 is 314342942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232776049 + 16467364 = 15257^2 + 4058^2 .

It is a cyclic number.

It is not a de Polignac number, because 249243413 - 2²² = 245049109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249243413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249243473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124621706 + 124621707.

It is an arithmetic number, because the mean of its divisors is an integer number (124621707).

Almost surely, 2^249243413 is an apocalyptic number.

It is an amenable number.

249243413 is a deficient number, since it is larger than the sum of its proper divisors (1).

249243413 is an equidigital number, since it uses as much as digits as its factorization.

249243413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The square root of 249243413 is about 15787.4447900856. Note that the first 3 decimals coincide. The cubic root of 249243413 is about 629.3243895346.

The spelling of 249243413 in words is "two hundred forty-nine million, two hundred forty-three thousand, four hundred thirteen".