1129721579 has 8 divisors (see below), whose sum is σ = 1291611360. Its totient is φ = 967957056.

The previous prime is 1129721543. The next prime is 1129721609. The reversal of 1129721579 is 9751279211.

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 1129721579 - 2²⁴ = 1112944363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129721479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11114 + ... + 48815.

It is an arithmetic number, because the mean of its divisors is an integer number (161451420).

Almost surely, 2^1129721579 is an apocalyptic number.

1129721579 is a deficient number, since it is larger than the sum of its proper divisors (161889781).

1129721579 is an equidigital number, since it uses as much as digits as its factorization.

1129721579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62629.

The product of its digits is 79380, while the sum is 44.

The square root of 1129721579 is about 33611.3311102075. The cubic root of 1129721579 is about 1041.4948851863.

The spelling of 1129721579 in words is "one billion, one hundred twenty-nine million, seven hundred twenty-one thousand, five hundred seventy-nine".