1129157569 has 4 divisors (see below), whose sum is σ = 1131325380. Its totient is φ = 1126989760.

The previous prime is 1129157567. The next prime is 1129157573. The reversal of 1129157569 is 9657519211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9657519211 = 1171 ⋅8247241.

It can be written as a sum of positive squares in 2 ways, for example, as 151782400 + 977375169 = 12320^2 + 31263^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129157569 - 2¹ = 1129157567 is a prime.

It is a super-2 number, since 2×1129157569² = 2549993631259979522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129157567) 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, 1083124 + ... + 1084165.

It is an arithmetic number, because the mean of its divisors is an integer number (282831345).

Almost surely, 2^1129157569 is an apocalyptic number.

It is an amenable number.

1129157569 is a deficient number, since it is larger than the sum of its proper divisors (2167811).

1129157569 is an equidigital number, since it uses as much as digits as its factorization.

1129157569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167810.

The product of its digits is 170100, while the sum is 46.

The square root of 1129157569 is about 33602.9398862659. The cubic root of 1129157569 is about 1041.3215353028.

The spelling of 1129157569 in words is "one billion, one hundred twenty-nine million, one hundred fifty-seven thousand, five hundred sixty-nine".