1129505749 has 16 divisors (see below), whose sum is σ = 1207281600. Its totient is φ = 1053651456.

The previous prime is 1129505743. The next prime is 1129505759. The reversal of 1129505749 is 9475059211.

It is a cyclic number.

It is not a de Polignac number, because 1129505749 - 2⁷ = 1129505621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129505743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555667 + ... + 557695.

It is an arithmetic number, because the mean of its divisors is an integer number (75455100).

Almost surely, 2^1129505749 is an apocalyptic number.

1129505749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1129505749 is a deficient number, since it is larger than the sum of its proper divisors (77775851).

1129505749 is a wasteful number, since it uses less digits than its factorization.

1129505749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484.

The product of its (nonzero) digits is 113400, while the sum is 43.

The square root of 1129505749 is about 33608.1202836457. The cubic root of 1129505749 is about 1041.4285561126.

The spelling of 1129505749 in words is "one billion, one hundred twenty-nine million, five hundred five thousand, seven hundred forty-nine".