1129899761 has 2 divisors, whose sum is σ = 1129899762. Its totient is φ = 1129899760.

The previous prime is 1129899721. The next prime is 1129899763. The reversal of 1129899761 is 1679989211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024960225 + 104939536 = 32015^2 + 10244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1129899761 is a prime.

Together with 1129899763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1129899763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564949880 + 564949881.

It is an arithmetic number, because the mean of its divisors is an integer number (564949881).

Almost surely, 2^1129899761 is an apocalyptic number.

It is an amenable number.

1129899761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129899761 is an equidigital number, since it uses as much as digits as its factorization.

1129899761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 53.

The square root of 1129899761 is about 33613.9816296731. The cubic root of 1129899761 is about 1041.5496378762.

The spelling of 1129899761 in words is "one billion, one hundred twenty-nine million, eight hundred ninety-nine thousand, seven hundred sixty-one".