1129421369 has 2 divisors, whose sum is σ = 1129421370. Its totient is φ = 1129421368.

The previous prime is 1129421329. The next prime is 1129421393. The reversal of 1129421369 is 9631249211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 666310969 + 463110400 = 25813^2 + 21520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129421369 - 2¹² = 1129417273 is a prime.

It is a super-2 number, since 2×1129421369² = 2551185257507668322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1129421309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564710684 + 564710685.

It is an arithmetic number, because the mean of its divisors is an integer number (564710685).

Almost surely, 2^1129421369 is an apocalyptic number.

It is an amenable number.

1129421369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129421369 is an equidigital number, since it uses as much as digits as its factorization.

1129421369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 1129421369 is about 33606.8649088248. The cubic root of 1129421369 is about 1041.4026220761.

The spelling of 1129421369 in words is "one billion, one hundred twenty-nine million, four hundred twenty-one thousand, three hundred sixty-nine".