1243993372 has 6 divisors (see below), whose sum is σ = 2176988408. Its totient is φ = 621996684.

The previous prime is 1243993357. The next prime is 1243993379. The reversal of 1243993372 is 2733993421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243993379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155499168 + ... + 155499175.

Almost surely, 2^1243993372 is an apocalyptic number.

It is an amenable number.

1243993372 is a deficient number, since it is larger than the sum of its proper divisors (932995036).

1243993372 is a wasteful number, since it uses less digits than its factorization.

1243993372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310998347 (or 310998345 counting only the distinct ones).

The product of its digits is 244944, while the sum is 43.

The square root of 1243993372 is about 35270.2902171218. The cubic root of 1243993372 is about 1075.4891221439.

The spelling of 1243993372 in words is "one billion, two hundred forty-three million, nine hundred ninety-three thousand, three hundred seventy-two".