1083194991 has 16 divisors (see below), whose sum is σ = 1625049600. Its totient is φ = 712987704.

The previous prime is 1083194977. The next prime is 1083194993. The reversal of 1083194991 is 1994913801.

It is a de Polignac number, because none of the positive numbers 2^k-1083194991 is a prime.

It is a super-2 number, since 2×1083194991² = 2346622777054980162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1083194993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251781 + ... + 256046.

It is an arithmetic number, because the mean of its divisors is an integer number (101565600).

Almost surely, 2^1083194991 is an apocalyptic number.

1083194991 is a deficient number, since it is larger than the sum of its proper divisors (541854609).

1083194991 is an equidigital number, since it uses as much as digits as its factorization.

1083194991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507915 (or 507909 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 1083194991 is about 32911.9277922154. The cubic root of 1083194991 is about 1026.9963048827.

The spelling of 1083194991 in words is "one billion, eighty-three million, one hundred ninety-four thousand, nine hundred ninety-one".