10898991 has 6 divisors (see below), whose sum is σ = 15743000. Its totient is φ = 7265988.

The previous prime is 10898981. The next prime is 10898999. The reversal of 10898991 is 19989801.

It is not a de Polignac number, because 10898991 - 2⁵ = 10898959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10898999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605491 + ... + 605508.

Almost surely, 2^10898991 is an apocalyptic number.

10898991 is a deficient number, since it is larger than the sum of its proper divisors (4844009).

10898991 is a wasteful number, since it uses less digits than its factorization.

10898991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211005 (or 1211002 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 10898991 is about 3301.3619916634. The cubic root of 10898991 is about 221.7151813711.

It can be divided in two parts, 108 and 98991, that added together give a palindrome (99099).

The spelling of 10898991 in words is "ten million, eight hundred ninety-eight thousand, nine hundred ninety-one".