1298243663 has 8 divisors (see below), whose sum is σ = 1320178896. Its totient is φ = 1276329600.

The previous prime is 1298243627. The next prime is 1298243669. The reversal of 1298243663 is 3663428921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1298243663 - 2⁶ = 1298243599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298243669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162695 + ... + 170487.

It is an arithmetic number, because the mean of its divisors is an integer number (165022362).

Almost surely, 2^1298243663 is an apocalyptic number.

1298243663 is a deficient number, since it is larger than the sum of its proper divisors (21935233).

1298243663 is an equidigital number, since it uses as much as digits as its factorization.

1298243663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10585.

The product of its digits is 373248, while the sum is 44.

The square root of 1298243663 is about 36031.1485106984. The cubic root of 1298243663 is about 1090.9011606017.

The spelling of 1298243663 in words is "one billion, two hundred ninety-eight million, two hundred forty-three thousand, six hundred sixty-three".