1243199964 has 48 divisors (see below), whose sum is σ = 2924096000. Its totient is φ = 411086016.

The previous prime is 1243199957. The next prime is 1243199977. The reversal of 1243199964 is 4699913421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162422 + ... + 1163490.

Almost surely, 2^1243199964 is an apocalyptic number.

It is an amenable number.

1243199964 is an abundant number, since it is smaller than the sum of its proper divisors (1680896036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243199964 is a wasteful number, since it uses less digits than its factorization.

1243199964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1760 counting only the distinct ones).

The product of its digits is 419904, while the sum is 48.

The square root of 1243199964 is about 35259.0408831551. The cubic root of 1243199964 is about 1075.2604276919.

The spelling of 1243199964 in words is "one billion, two hundred forty-three million, one hundred ninety-nine thousand, nine hundred sixty-four".