1891112965 has 16 divisors (see below), whose sum is σ = 2607114240. Its totient is φ = 1289969280.

The previous prime is 1891112947. The next prime is 1891112999. The reversal of 1891112965 is 5692111981.

It is not a de Polignac number, because 1891112965 - 2⁷ = 1891112837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134760 + ... + 148129.

It is an arithmetic number, because the mean of its divisors is an integer number (162944640).

Almost surely, 2^1891112965 is an apocalyptic number.

It is an amenable number.

1891112965 is a deficient number, since it is larger than the sum of its proper divisors (716001275).

1891112965 is a wasteful number, since it uses less digits than its factorization.

1891112965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283092.

The product of its digits is 38880, while the sum is 43.

The square root of 1891112965 is about 43486.9286682792. The cubic root of 1891112965 is about 1236.6282326005.

The spelling of 1891112965 in words is "one billion, eight hundred ninety-one million, one hundred twelve thousand, nine hundred sixty-five".