1129789431 has 32 divisors (see below), whose sum is σ = 1714944000. Its totient is φ = 734767200.

The previous prime is 1129789429. The next prime is 1129789447. The reversal of 1129789431 is 1349879211.

It is not a de Polignac number, because 1129789431 - 2¹ = 1129789429 is a prime.

It is a super-2 number, since 2×1129789431² = 2552848316798607522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129785431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 441606 + ... + 444156.

It is an arithmetic number, because the mean of its divisors is an integer number (53592000).

Almost surely, 2^1129789431 is an apocalyptic number.

1129789431 is a deficient number, since it is larger than the sum of its proper divisors (585154569).

1129789431 is a wasteful number, since it uses less digits than its factorization.

1129789431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956 (or 2950 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1129789431 is about 33612.3404570405. The cubic root of 1129789431 is about 1041.5157357798.

The spelling of 1129789431 in words is "one billion, one hundred twenty-nine million, seven hundred eighty-nine thousand, four hundred thirty-one".