1147818947 has 12 divisors (see below), whose sum is σ = 1262994600. Its totient is φ = 1042361760.

The previous prime is 1147818929. The next prime is 1147818949. The reversal of 1147818947 is 7498187411.

It is not a de Polignac number, because 1147818947 - 2¹⁴ = 1147802563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1147818895 and 1147818904.

It is not an unprimeable number, because it can be changed into a prime (1147818949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122408 + ... + 131450.

It is an arithmetic number, because the mean of its divisors is an integer number (105249550).

Almost surely, 2^1147818947 is an apocalyptic number.

1147818947 is a deficient number, since it is larger than the sum of its proper divisors (115175653).

1147818947 is a wasteful number, since it uses less digits than its factorization.

1147818947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10114 (or 10103 counting only the distinct ones).

The product of its digits is 451584, while the sum is 50.

The square root of 1147818947 is about 33879.4767816742. The cubic root of 1147818947 is about 1047.0267959074.

The spelling of 1147818947 in words is "one billion, one hundred forty-seven million, eight hundred eighteen thousand, nine hundred forty-seven".