1147891847 has 2 divisors, whose sum is σ = 1147891848. Its totient is φ = 1147891846.

The previous prime is 1147891819. The next prime is 1147891879. The reversal of 1147891847 is 7481987411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1147891847 - 2¹⁶ = 1147826311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1147891795 and 1147891804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1147891807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573945923 + 573945924.

It is an arithmetic number, because the mean of its divisors is an integer number (573945924).

Almost surely, 2^1147891847 is an apocalyptic number.

1147891847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147891847 is an equidigital number, since it uses as much as digits as its factorization.

1147891847 is an evil number, because the sum of its binary digits is even.

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

The square root of 1147891847 is about 33880.5526371693. The cubic root of 1147891847 is about 1047.0489616093.

The spelling of 1147891847 in words is "one billion, one hundred forty-seven million, eight hundred ninety-one thousand, eight hundred forty-seven".