1248979791 has 8 divisors (see below), whose sum is σ = 1693532160. Its totient is φ = 818540312.

The previous prime is 1248979789. The next prime is 1248979829. The reversal of 1248979791 is 1979798421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1248979791 - 2¹ = 1248979789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248979091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3528015 + ... + 3528368.

It is an arithmetic number, because the mean of its divisors is an integer number (211691520).

Almost surely, 2^1248979791 is an apocalyptic number.

1248979791 is a deficient number, since it is larger than the sum of its proper divisors (444552369).

1248979791 is an equidigital number, since it uses as much as digits as its factorization.

1248979791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7056445.

The product of its digits is 2286144, while the sum is 57.

The square root of 1248979791 is about 35340.9081801812. The cubic root of 1248979791 is about 1076.9242020955.

The spelling of 1248979791 in words is "one billion, two hundred forty-eight million, nine hundred seventy-nine thousand, seven hundred ninety-one".