1112978591 has 2 divisors, whose sum is σ = 1112978592. Its totient is φ = 1112978590.

The previous prime is 1112978567. The next prime is 1112978609. The reversal of 1112978591 is 1958792111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112978591 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112971591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556489295 + 556489296.

It is an arithmetic number, because the mean of its divisors is an integer number (556489296).

Almost surely, 2^1112978591 is an apocalyptic number.

1112978591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112978591 is an equidigital number, since it uses as much as digits as its factorization.

1112978591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 44.

The square root of 1112978591 is about 33361.3337712988. Note that the first 3 decimals coincide. The cubic root of 1112978591 is about 1036.3241132836.

The spelling of 1112978591 in words is "one billion, one hundred twelve million, nine hundred seventy-eight thousand, five hundred ninety-one".