1155259913 has 2 divisors, whose sum is σ = 1155259914. Its totient is φ = 1155259912.

The previous prime is 1155259909. The next prime is 1155259999. The reversal of 1155259913 is 3199525511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 814931209 + 340328704 = 28547^2 + 18448^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155259913 - 2² = 1155259909 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155259613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577629956 + 577629957.

It is an arithmetic number, because the mean of its divisors is an integer number (577629957).

Almost surely, 2^1155259913 is an apocalyptic number.

It is an amenable number.

1155259913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155259913 is an equidigital number, since it uses as much as digits as its factorization.

1155259913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60750, while the sum is 41.

The square root of 1155259913 is about 33989.1146251267. The cubic root of 1155259913 is about 1049.2844445971.

The spelling of 1155259913 in words is "one billion, one hundred fifty-five million, two hundred fifty-nine thousand, nine hundred thirteen".