1129577905 has 4 divisors (see below), whose sum is σ = 1355493492. Its totient is φ = 903662320.

The previous prime is 1129577887. The next prime is 1129577947. The reversal of 1129577905 is 5097759211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 394300449 + 735277456 = 19857^2 + 27116^2 .

It is not a de Polignac number, because 1129577905 - 2⁷ = 1129577777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112957786 + ... + 112957795.

It is an arithmetic number, because the mean of its divisors is an integer number (338873373).

Almost surely, 2^1129577905 is an apocalyptic number.

It is an amenable number.

1129577905 is a deficient number, since it is larger than the sum of its proper divisors (225915587).

1129577905 is an equidigital number, since it uses as much as digits as its factorization.

1129577905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225915586.

The product of its (nonzero) digits is 198450, while the sum is 46.

The square root of 1129577905 is about 33609.1937570659. The cubic root of 1129577905 is about 1041.4507321009.

The spelling of 1129577905 in words is "one billion, one hundred twenty-nine million, five hundred seventy-seven thousand, nine hundred five".