1244517863 has 2 divisors, whose sum is σ = 1244517864. Its totient is φ = 1244517862.

The previous prime is 1244517851. The next prime is 1244517871. The reversal of 1244517863 is 3687154421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244517863 is a prime.

It is a super-2 number, since 2×1244517863² = 3097649422652173538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1244517863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244517823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622258931 + 622258932.

It is an arithmetic number, because the mean of its divisors is an integer number (622258932).

Almost surely, 2^1244517863 is an apocalyptic number.

1244517863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244517863 is an equidigital number, since it uses as much as digits as its factorization.

1244517863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 1244517863 is about 35277.7247423923. The cubic root of 1244517863 is about 1075.6402497196.

The spelling of 1244517863 in words is "one billion, two hundred forty-four million, five hundred seventeen thousand, eight hundred sixty-three".