1115146891 has 2 divisors, whose sum is σ = 1115146892. Its totient is φ = 1115146890.

The previous prime is 1115146853. The next prime is 1115146913. The reversal of 1115146891 is 1986415111.

It is a strong prime.

It is an emirp because it is prime and its reverse (1986415111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1115146891 - 2⁹ = 1115146379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1115146891.

It is not a weakly prime, because it can be changed into another prime (1115146091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557573445 + 557573446.

It is an arithmetic number, because the mean of its divisors is an integer number (557573446).

Almost surely, 2^1115146891 is an apocalyptic number.

1115146891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115146891 is an equidigital number, since it uses as much as digits as its factorization.

1115146891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 37.

The square root of 1115146891 is about 33393.8151608947. The cubic root of 1115146891 is about 1036.9966640801.

The spelling of 1115146891 in words is "one billion, one hundred fifteen million, one hundred forty-six thousand, eight hundred ninety-one".