1243074663 has 12 divisors (see below), whose sum is σ = 1901173248. Its totient is φ = 779968320.

The previous prime is 1243074641. The next prime is 1243074689. The reversal of 1243074663 is 3664703421.

It is a happy number.

It is not a de Polignac number, because 1243074663 - 2²⁰ = 1242026087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243074263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4062183 + ... + 4062488.

It is an arithmetic number, because the mean of its divisors is an integer number (158431104).

Almost surely, 2^1243074663 is an apocalyptic number.

1243074663 is a deficient number, since it is larger than the sum of its proper divisors (658098585).

1243074663 is a wasteful number, since it uses less digits than its factorization.

1243074663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124694 (or 8124691 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 1243074663 is about 35257.2639749598. The cubic root of 1243074663 is about 1075.2243016362.

The spelling of 1243074663 in words is "one billion, two hundred forty-three million, seventy-four thousand, six hundred sixty-three".