1150553891 has 2 divisors, whose sum is σ = 1150553892. Its totient is φ = 1150553890.

The previous prime is 1150553869. The next prime is 1150553893. The reversal of 1150553891 is 1983550511.

It is a strong prime.

It is an emirp because it is prime and its reverse (1983550511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1150553891 - 2³⁰ = 76812067 is a prime.

Together with 1150553893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1150553893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575276945 + 575276946.

It is an arithmetic number, because the mean of its divisors is an integer number (575276946).

Almost surely, 2^1150553891 is an apocalyptic number.

1150553891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1150553891 is an equidigital number, since it uses as much as digits as its factorization.

1150553891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 38.

The square root of 1150553891 is about 33919.8156097583. The cubic root of 1150553891 is about 1047.8577307578.

The spelling of 1150553891 in words is "one billion, one hundred fifty million, five hundred fifty-three thousand, eight hundred ninety-one".