1156553947 has 2 divisors, whose sum is σ = 1156553948. Its totient is φ = 1156553946.

The previous prime is 1156553927. The next prime is 1156553999. The reversal of 1156553947 is 7493556511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1156553947 - 2¹¹ = 1156551899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1156553897 and 1156553906.

It is not a weakly prime, because it can be changed into another prime (1156553927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578276973 + 578276974.

It is an arithmetic number, because the mean of its divisors is an integer number (578276974).

Almost surely, 2^1156553947 is an apocalyptic number.

1156553947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156553947 is an equidigital number, since it uses as much as digits as its factorization.

1156553947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567000, while the sum is 46.

The square root of 1156553947 is about 34008.1453037357. The cubic root of 1156553947 is about 1049.6760745311.

The spelling of 1156553947 in words is "one billion, one hundred fifty-six million, five hundred fifty-three thousand, nine hundred forty-seven".