1247979033 has 96 divisors (see below), whose sum is σ = 2264371200. Its totient is φ = 646444800.

The previous prime is 1247979001. The next prime is 1247979077. The reversal of 1247979033 is 3309797421.

It is not a de Polignac number, because 1247979033 - 2⁵ = 1247979001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1247979033.

It is not an unprimeable number, because it can be changed into a prime (1247979833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2895328 + ... + 2895758.

It is an arithmetic number, because the mean of its divisors is an integer number (23587200).

Almost surely, 2^1247979033 is an apocalyptic number.

It is an amenable number.

1247979033 is a deficient number, since it is larger than the sum of its proper divisors (1016392167).

1247979033 is a wasteful number, since it uses less digits than its factorization.

1247979033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 1247979033 is about 35326.7467084078. The cubic root of 1247979033 is about 1076.6364930130.

The spelling of 1247979033 in words is "one billion, two hundred forty-seven million, nine hundred seventy-nine thousand, thirty-three".