1154289449 has 2 divisors, whose sum is σ = 1154289450. Its totient is φ = 1154289448.

The previous prime is 1154289413. The next prime is 1154289517. The reversal of 1154289449 is 9449824511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1126273600 + 28015849 = 33560^2 + 5293^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154289449 - 2²⁰ = 1153240873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1154289049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577144724 + 577144725.

It is an arithmetic number, because the mean of its divisors is an integer number (577144725).

Almost surely, 2^1154289449 is an apocalyptic number.

It is an amenable number.

1154289449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154289449 is an equidigital number, since it uses as much as digits as its factorization.

1154289449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 47.

The square root of 1154289449 is about 33974.8355257240. The cubic root of 1154289449 is about 1048.9905488147.

The spelling of 1154289449 in words is "one billion, one hundred fifty-four million, two hundred eighty-nine thousand, four hundred forty-nine".