1154131289 has 2 divisors, whose sum is σ = 1154131290. Its totient is φ = 1154131288.

The previous prime is 1154131261. The next prime is 1154131337. The reversal of 1154131289 is 9821314511.

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., 960504064 + 193627225 = 30992^2 + 13915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1154131289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1154131219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577065644 + 577065645.

It is an arithmetic number, because the mean of its divisors is an integer number (577065645).

Almost surely, 2^1154131289 is an apocalyptic number.

It is an amenable number.

1154131289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154131289 is an equidigital number, since it uses as much as digits as its factorization.

1154131289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 1154131289 is about 33972.5078408998. The cubic root of 1154131289 is about 1048.9426359556.

The spelling of 1154131289 in words is "one billion, one hundred fifty-four million, one hundred thirty-one thousand, two hundred eighty-nine".