1129043657 has 4 divisors (see below), whose sum is σ = 1290335616. Its totient is φ = 967751700.

The previous prime is 1129043651. The next prime is 1129043659. The reversal of 1129043657 is 7563409211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7563409211 = 19 ⋅398074169.

It is a cyclic number.

It is not a de Polignac number, because 1129043657 - 2¹⁰ = 1129042633 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 1129043657.

It is not an unprimeable number, because it can be changed into a prime (1129043651) 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, 80645969 + ... + 80645982.

It is an arithmetic number, because the mean of its divisors is an integer number (322583904).

Almost surely, 2^1129043657 is an apocalyptic number.

It is an amenable number.

1129043657 is a deficient number, since it is larger than the sum of its proper divisors (161291959).

1129043657 is an equidigital number, since it uses as much as digits as its factorization.

1129043657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161291958.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1129043657 is about 33601.2448727722. The cubic root of 1129043657 is about 1041.2865171586.

The spelling of 1129043657 in words is "one billion, one hundred twenty-nine million, forty-three thousand, six hundred fifty-seven".