1147128047 has 4 divisors (see below), whose sum is σ = 1235368680. Its totient is φ = 1058887416.

The previous prime is 1147128029. The next prime is 1147128049. The reversal of 1147128047 is 7408217411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1147128047 - 2⁸ = 1147127791 is a prime.

It is a super-3 number, since 3×1147128047³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1147127998 and 1147128016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147128049) 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, 44120297 + ... + 44120322.

It is an arithmetic number, because the mean of its divisors is an integer number (308842170).

Almost surely, 2^1147128047 is an apocalyptic number.

1147128047 is a deficient number, since it is larger than the sum of its proper divisors (88240633).

1147128047 is an equidigital number, since it uses as much as digits as its factorization.

1147128047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88240632.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 1147128047 is about 33869.2788083833. The cubic root of 1147128047 is about 1046.8166768215.

The spelling of 1147128047 in words is "one billion, one hundred forty-seven million, one hundred twenty-eight thousand, forty-seven".