1129089431 has 4 divisors (see below), whose sum is σ = 1148226600. Its totient is φ = 1109952264.

The previous prime is 1129089419. The next prime is 1129089463. The reversal of 1129089431 is 1349809211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1349809211 = 23 ⋅58687357.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1129089431 is a prime.

It is a super-2 number, since 2×1129089431² = 2549685886391807522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129089331) 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, 9568496 + ... + 9568613.

It is an arithmetic number, because the mean of its divisors is an integer number (287056650).

Almost surely, 2^1129089431 is an apocalyptic number.

1129089431 is a deficient number, since it is larger than the sum of its proper divisors (19137169).

1129089431 is an equidigital number, since it uses as much as digits as its factorization.

1129089431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19137168.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1129089431 is about 33601.9260013470. The cubic root of 1129089431 is about 1041.3005890104.

The spelling of 1129089431 in words is "one billion, one hundred twenty-nine million, eighty-nine thousand, four hundred thirty-one".