1123834891 has 8 divisors (see below), whose sum is σ = 1143555840. Its totient is φ = 1104136488.

The previous prime is 1123834889. The next prime is 1123834913. The reversal of 1123834891 is 1984383211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123834891 - 2¹ = 1123834889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123834801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118570 + ... + 127696.

It is an arithmetic number, because the mean of its divisors is an integer number (142944480).

Almost surely, 2^1123834891 is an apocalyptic number.

1123834891 is a deficient number, since it is larger than the sum of its proper divisors (19720949).

1123834891 is an equidigital number, since it uses as much as digits as its factorization.

1123834891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11273.

The product of its digits is 41472, while the sum is 40.

The square root of 1123834891 is about 33523.6467437539. The cubic root of 1123834891 is about 1039.6827468581.

The spelling of 1123834891 in words is "one billion, one hundred twenty-three million, eight hundred thirty-four thousand, eight hundred ninety-one".