1155434369 has 2 divisors, whose sum is σ = 1155434370. Its totient is φ = 1155434368.

The previous prime is 1155434351. The next prime is 1155434389. The reversal of 1155434369 is 9634345511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 701190400 + 454243969 = 26480^2 + 21313^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155434369 - 2¹⁶ = 1155368833 is a prime.

It is a super-2 number, since 2×1155434369² = 2670057162132856322, 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 (1155434309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577717184 + 577717185.

It is an arithmetic number, because the mean of its divisors is an integer number (577717185).

Almost surely, 2^1155434369 is an apocalyptic number.

It is an amenable number.

1155434369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155434369 is an equidigital number, since it uses as much as digits as its factorization.

1155434369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 41.

The square root of 1155434369 is about 33991.6808792975. The cubic root of 1155434369 is about 1049.3372594807.

The spelling of 1155434369 in words is "one billion, one hundred fifty-five million, four hundred thirty-four thousand, three hundred sixty-nine".