1129724369 has 2 divisors, whose sum is σ = 1129724370. Its totient is φ = 1129724368.

The previous prime is 1129724353. The next prime is 1129724459. The reversal of 1129724369 is 9634279211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114224400 + 15499969 = 33380^2 + 3937^2 .

It is an emirp because it is prime and its reverse (9634279211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1129724369 - 2⁴ = 1129724353 is a prime.

It is a super-2 number, since 2×1129724369² = 2552554299824896322, 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 (1129724329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564862184 + 564862185.

It is an arithmetic number, because the mean of its divisors is an integer number (564862185).

Almost surely, 2^1129724369 is an apocalyptic number.

It is an amenable number.

1129724369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129724369 is an equidigital number, since it uses as much as digits as its factorization.

1129724369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 1129724369 is about 33611.3726140424. The cubic root of 1129724369 is about 1041.4957425563.

The spelling of 1129724369 in words is "one billion, one hundred twenty-nine million, seven hundred twenty-four thousand, three hundred sixty-nine".