1153823917 has 2 divisors, whose sum is σ = 1153823918. Its totient is φ = 1153823916.

The previous prime is 1153823863. The next prime is 1153823921. The reversal of 1153823917 is 7193283511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640393636 + 513430281 = 25306^2 + 22659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153823917 - 2⁷ = 1153823789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1153823917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1153823017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576911958 + 576911959.

It is an arithmetic number, because the mean of its divisors is an integer number (576911959).

Almost surely, 2^1153823917 is an apocalyptic number.

It is an amenable number.

1153823917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153823917 is an equidigital number, since it uses as much as digits as its factorization.

1153823917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 1153823917 is about 33967.9837052481. The cubic root of 1153823917 is about 1048.8495084159.

The spelling of 1153823917 in words is "one billion, one hundred fifty-three million, eight hundred twenty-three thousand, nine hundred seventeen".