1129478399 has 8 divisors (see below), whose sum is σ = 1335344160. Its totient is φ = 934740576.

The previous prime is 1129478393. The next prime is 1129478417. The reversal of 1129478399 is 9938749211.

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

It is not a de Polignac number, because 1129478399 - 2²⁸ = 861042943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1129478399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129478393) 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, 2781764 + ... + 2782169.

It is an arithmetic number, because the mean of its divisors is an integer number (166918020).

Almost surely, 2^1129478399 is an apocalyptic number.

1129478399 is a deficient number, since it is larger than the sum of its proper divisors (205865761).

1129478399 is an equidigital number, since it uses as much as digits as its factorization.

1129478399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5563969.

The product of its digits is 979776, while the sum is 53.

The square root of 1129478399 is about 33607.7133854715. The cubic root of 1129478399 is about 1041.4201502823.

The spelling of 1129478399 in words is "one billion, one hundred twenty-nine million, four hundred seventy-eight thousand, three hundred ninety-nine".