1154868109 has 2 divisors, whose sum is σ = 1154868110. Its totient is φ = 1154868108.

The previous prime is 1154868061. The next prime is 1154868119. The reversal of 1154868109 is 9018684511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 753667209 + 401200900 = 27453^2 + 20030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154868109 - 2⁷ = 1154867981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1154868119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577434054 + 577434055.

It is an arithmetic number, because the mean of its divisors is an integer number (577434055).

Almost surely, 2^1154868109 is an apocalyptic number.

It is an amenable number.

1154868109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154868109 is an equidigital number, since it uses as much as digits as its factorization.

1154868109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 43.

The square root of 1154868109 is about 33983.3504675451. The cubic root of 1154868109 is about 1049.1658103045.

The spelling of 1154868109 in words is "one billion, one hundred fifty-four million, eight hundred sixty-eight thousand, one hundred nine".