1153138891 has 2 divisors, whose sum is σ = 1153138892. Its totient is φ = 1153138890.

The previous prime is 1153138859. The next prime is 1153138907. The reversal of 1153138891 is 1988313511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1153138891 - 2⁵ = 1153138859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1153138801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576569445 + 576569446.

It is an arithmetic number, because the mean of its divisors is an integer number (576569446).

Almost surely, 2^1153138891 is an apocalyptic number.

1153138891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153138891 is an equidigital number, since it uses as much as digits as its factorization.

1153138891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 40.

The square root of 1153138891 is about 33957.8988013098. The cubic root of 1153138891 is about 1048.6418997826.

The spelling of 1153138891 in words is "one billion, one hundred fifty-three million, one hundred thirty-eight thousand, eight hundred ninety-one".