1101448891 has 4 divisors (see below), whose sum is σ = 1101897832. Its totient is φ = 1100999952.

The previous prime is 1101448847. The next prime is 1101448897. The reversal of 1101448891 is 1988441011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1101448891 - 2⁷ = 1101448763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1101448891.

It is not an unprimeable number, because it can be changed into a prime (1101448897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220770 + ... + 225703.

It is an arithmetic number, because the mean of its divisors is an integer number (275474458).

Almost surely, 2^1101448891 is an apocalyptic number.

1101448891 is a deficient number, since it is larger than the sum of its proper divisors (448941).

1101448891 is an equidigital number, since it uses as much as digits as its factorization.

1101448891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448940.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 1101448891 is about 33188.0835692572. The cubic root of 1101448891 is about 1032.7331473251.

The spelling of 1101448891 in words is "one billion, one hundred one million, four hundred forty-eight thousand, eight hundred ninety-one".