1147955823 has 72 divisors (see below), whose sum is σ = 1994388864. Its totient is φ = 623129760.

The previous prime is 1147955791. The next prime is 1147955827. The reversal of 1147955823 is 3285597411.

1147955823 is a `hidden beast` number, since 1 + 1 + 4 + 79 + 558 + 23 = 666.

It is not a de Polignac number, because 1147955823 - 2⁵ = 1147955791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147955827) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4056240 + ... + 4056522.

Almost surely, 2^1147955823 is an apocalyptic number.

1147955823 is a deficient number, since it is larger than the sum of its proper divisors (846433041).

1147955823 is a wasteful number, since it uses less digits than its factorization.

1147955823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 391 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 1147955823 is about 33881.4967644583. The cubic root of 1147955823 is about 1047.0684131398.

The spelling of 1147955823 in words is "one billion, one hundred forty-seven million, nine hundred fifty-five thousand, eight hundred twenty-three".