1084126991 has 8 divisors (see below), whose sum is σ = 1097464320. Its totient is φ = 1070864928.

The previous prime is 1084126987. The next prime is 1084126997. The reversal of 1084126991 is 1996214801.

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 1084126991 - 2² = 1084126987 is a prime.

It is a super-2 number, since 2×1084126991² = 2350662665229428162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1084126997) 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, 10445 + ... + 47721.

It is an arithmetic number, because the mean of its divisors is an integer number (137183040).

Almost surely, 2^1084126991 is an apocalyptic number.

1084126991 is a deficient number, since it is larger than the sum of its proper divisors (13337329).

1084126991 is a wasteful number, since it uses less digits than its factorization.

1084126991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37633.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1084126991 is about 32926.0837482990. The cubic root of 1084126991 is about 1027.2907689992.

The spelling of 1084126991 in words is "one billion, eighty-four million, one hundred twenty-six thousand, nine hundred ninety-one".