1154020289 has 2 divisors, whose sum is σ = 1154020290. Its totient is φ = 1154020288.

The previous prime is 1154020279. The next prime is 1154020319. The reversal of 1154020289 is 9820204511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 891321025 + 262699264 = 29855^2 + 16208^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154020289 - 2²⁰ = 1152971713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1154020279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577010144 + 577010145.

It is an arithmetic number, because the mean of its divisors is an integer number (577010145).

Almost surely, 2^1154020289 is an apocalyptic number.

It is an amenable number.

1154020289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154020289 is an equidigital number, since it uses as much as digits as its factorization.

1154020289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1154020289 is about 33970.8741276995. The cubic root of 1154020289 is about 1048.9090070936.

The spelling of 1154020289 in words is "one billion, one hundred fifty-four million, twenty thousand, two hundred eighty-nine".