1154961289 has 2 divisors, whose sum is σ = 1154961290. Its totient is φ = 1154961288.

The previous prime is 1154961281. The next prime is 1154961391. The reversal of 1154961289 is 9821694511.

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., 1145145600 + 9815689 = 33840^2 + 3133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154961289 - 2³ = 1154961281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1154961281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577480644 + 577480645.

It is an arithmetic number, because the mean of its divisors is an integer number (577480645).

Almost surely, 2^1154961289 is an apocalyptic number.

It is an amenable number.

1154961289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154961289 is an equidigital number, since it uses as much as digits as its factorization.

1154961289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 46.

The square root of 1154961289 is about 33984.7214053610. The cubic root of 1154961289 is about 1049.1940266986.

The spelling of 1154961289 in words is "one billion, one hundred fifty-four million, nine hundred sixty-one thousand, two hundred eighty-nine".