10643491 has 4 divisors (see below), whose sum is σ = 10652152. Its totient is φ = 10634832.

The previous prime is 10643483. The next prime is 10643497. The reversal of 10643491 is 19434601.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10643491 - 2³ = 10643483 is a prime.

It is a super-2 number, since 2×10643491² = 226567801334162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10643497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2106 + ... + 5071.

It is an arithmetic number, because the mean of its divisors is an integer number (2663038).

Almost surely, 2^10643491 is an apocalyptic number.

10643491 is a deficient number, since it is larger than the sum of its proper divisors (8661).

10643491 is an equidigital number, since it uses as much as digits as its factorization.

10643491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8660.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 10643491 is about 3262.4363595326. The cubic root of 10643491 is about 219.9689418966.

The spelling of 10643491 in words is "ten million, six hundred forty-three thousand, four hundred ninety-one".