1051008891 has 8 divisors (see below), whose sum is σ = 1414442304. Its totient is φ = 694124040.

The previous prime is 1051008863. The next prime is 1051008913. The reversal of 1051008891 is 1988001501.

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

It is not a de Polignac number, because 1051008891 - 2⁵ = 1051008859 is a prime.

It is a super-2 number, since 2×1051008891² = 2209239377922099762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051008821) 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, 1636765 + ... + 1637406.

It is an arithmetic number, because the mean of its divisors is an integer number (176805288).

Almost surely, 2^1051008891 is an apocalyptic number.

1051008891 is a deficient number, since it is larger than the sum of its proper divisors (363433413).

1051008891 is a wasteful number, since it uses less digits than its factorization.

1051008891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274281.

The product of its (nonzero) digits is 2880, while the sum is 33.

The square root of 1051008891 is about 32419.2672804306. The cubic root of 1051008891 is about 1016.7217869366.

The spelling of 1051008891 in words is "one billion, fifty-one million, eight thousand, eight hundred ninety-one".