10639191 has 4 divisors (see below), whose sum is σ = 14185592. Its totient is φ = 7092792.

The previous prime is 10639177. The next prime is 10639207. The reversal of 10639191 is 19193601.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 10639191 - 2¹⁸ = 10377047 is a prime.

It is a super-2 number, since 2×10639191² = 226384770268962, 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 (10639121) 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 3 ways as a sum of consecutive naturals, for example, 1773196 + ... + 1773201.

It is an arithmetic number, because the mean of its divisors is an integer number (3546398).

Almost surely, 2^10639191 is an apocalyptic number.

10639191 is a deficient number, since it is larger than the sum of its proper divisors (3546401).

10639191 is an equidigital number, since it uses as much as digits as its factorization.

10639191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546400.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 10639191 is about 3261.7772762713. Note that the first 3 decimals coincide. The cubic root of 10639191 is about 219.9393152182.

The spelling of 10639191 in words is "ten million, six hundred thirty-nine thousand, one hundred ninety-one".