1244623663 has 4 divisors (see below), whose sum is σ = 1244852568. Its totient is φ = 1244394760.

The previous prime is 1244623651. The next prime is 1244623727. The reversal of 1244623663 is 3663264421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1244623663 - 2¹⁷ = 1244492591 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 (1244623603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106093 + ... + 117238.

It is an arithmetic number, because the mean of its divisors is an integer number (311213142).

Almost surely, 2^1244623663 is an apocalyptic number.

1244623663 is a deficient number, since it is larger than the sum of its proper divisors (228905).

1244623663 is an equidigital number, since it uses as much as digits as its factorization.

1244623663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228904.

The product of its digits is 124416, while the sum is 37.

The square root of 1244623663 is about 35279.2242403373. The cubic root of 1244623663 is about 1075.6707299339.

The spelling of 1244623663 in words is "one billion, two hundred forty-four million, six hundred twenty-three thousand, six hundred sixty-three".