10191971 has 4 divisors (see below), whose sum is σ = 10203744. Its totient is φ = 10180200.

The previous prime is 10191943. The next prime is 10191977. The reversal of 10191971 is 17919101.

10191971 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17919101 = 97 ⋅184733.

It is a cyclic number.

It is not a de Polignac number, because 10191971 - 2¹⁴ = 10175587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10191977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4475 + ... + 6356.

It is an arithmetic number, because the mean of its divisors is an integer number (2550936).

Almost surely, 2^10191971 is an apocalyptic number.

10191971 is a deficient number, since it is larger than the sum of its proper divisors (11773).

10191971 is an equidigital number, since it uses as much as digits as its factorization.

10191971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11772.

The product of its (nonzero) digits is 567, while the sum is 29.

The square root of 10191971 is about 3192.4866483668. The cubic root of 10191971 is about 216.8133699425.

The spelling of 10191971 in words is "ten million, one hundred ninety-one thousand, nine hundred seventy-one".