10749991 has 16 divisors (see below), whose sum is σ = 13052160. Its totient is φ = 8648640.

The previous prime is 10749989. The next prime is 10749997. The reversal of 10749991 is 19994701.

It is a happy number.

10749991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10749991 - 2¹ = 10749989 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 (10749997) 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, 17115 + ... + 17731.

It is an arithmetic number, because the mean of its divisors is an integer number (815760).

Almost surely, 2^10749991 is an apocalyptic number.

10749991 is a deficient number, since it is larger than the sum of its proper divisors (2302169).

10749991 is a wasteful number, since it uses less digits than its factorization.

10749991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 10749991 is about 3278.7178896636. The cubic root of 10749991 is about 220.7001865313.

The spelling of 10749991 in words is "ten million, seven hundred forty-nine thousand, nine hundred ninety-one".