1153823897 has 4 divisors (see below), whose sum is σ = 1154636160. Its totient is φ = 1153011636.

The previous prime is 1153823863. The next prime is 1153823917. The reversal of 1153823897 is 7983283511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1153823897 - 2⁸ = 1153823641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153823807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403997 + ... + 406842.

It is an arithmetic number, because the mean of its divisors is an integer number (288659040).

Almost surely, 2^1153823897 is an apocalyptic number.

It is an amenable number.

1153823897 is a deficient number, since it is larger than the sum of its proper divisors (812263).

1153823897 is an equidigital number, since it uses as much as digits as its factorization.

1153823897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812262.

The product of its digits is 362880, while the sum is 47.

The square root of 1153823897 is about 33967.9834108532. The cubic root of 1153823897 is about 1048.8495023557.

The spelling of 1153823897 in words is "one billion, one hundred fifty-three million, eight hundred twenty-three thousand, eight hundred ninety-seven".