1129750049 has 4 divisors (see below), whose sum is σ = 1129841940. Its totient is φ = 1129658160.

The previous prime is 1129750033. The next prime is 1129750091. The reversal of 1129750049 is 9400579211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9400579211 = 3847 ⋅2443613.

It can be written as a sum of positive squares in 2 ways, for example, as 224041024 + 905709025 = 14968^2 + 30095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129750049 - 2⁴ = 1129750033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1129749994 and 1129750021.

It is not an unprimeable number, because it can be changed into a prime (1129750099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24014 + ... + 53255.

It is an arithmetic number, because the mean of its divisors is an integer number (282460485).

Almost surely, 2^1129750049 is an apocalyptic number.

It is an amenable number.

1129750049 is a deficient number, since it is larger than the sum of its proper divisors (91891).

1129750049 is an equidigital number, since it uses as much as digits as its factorization.

1129750049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91890.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1129750049 is about 33611.7546254283. The cubic root of 1129750049 is about 1041.5036339821.

The spelling of 1129750049 in words is "one billion, one hundred twenty-nine million, seven hundred fifty thousand, forty-nine".