1129807961 has 4 divisors (see below), whose sum is σ = 1130844624. Its totient is φ = 1128771300.

The previous prime is 1129807957. The next prime is 1129807967. The reversal of 1129807961 is 1697089211.

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.

It is a cyclic number.

It is not a de Polignac number, because 1129807961 - 2² = 1129807957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129807967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516695 + ... + 518876.

It is an arithmetic number, because the mean of its divisors is an integer number (282711156).

Almost surely, 2^1129807961 is an apocalyptic number.

It is an amenable number.

1129807961 is a deficient number, since it is larger than the sum of its proper divisors (1036663).

1129807961 is a wasteful number, since it uses less digits than its factorization.

1129807961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036662.

The product of its (nonzero) digits is 54432, while the sum is 44.

The square root of 1129807961 is about 33612.6160987210. The cubic root of 1129807961 is about 1041.5214298146.

The spelling of 1129807961 in words is "one billion, one hundred twenty-nine million, eight hundred seven thousand, nine hundred sixty-one".