1154921489 has 2 divisors, whose sum is σ = 1154921490. Its totient is φ = 1154921488.

The previous prime is 1154921431. The next prime is 1154921533. The reversal of 1154921489 is 9841294511.

It is an a-pointer prime, because the next prime (1154921533) can be obtained adding 1154921489 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1103369089 + 51552400 = 33217^2 + 7180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154921489 - 2¹⁶ = 1154855953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1154921189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577460744 + 577460745.

It is an arithmetic number, because the mean of its divisors is an integer number (577460745).

Almost surely, 2^1154921489 is an apocalyptic number.

It is an amenable number.

1154921489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154921489 is an equidigital number, since it uses as much as digits as its factorization.

1154921489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 1154921489 is about 33984.1358430665. The cubic root of 1154921489 is about 1049.1819748079.

The spelling of 1154921489 in words is "one billion, one hundred fifty-four million, nine hundred twenty-one thousand, four hundred eighty-nine".