10191491 has 4 divisors (see below), whose sum is σ = 10205712. Its totient is φ = 10177272.

The previous prime is 10191481. The next prime is 10191563. The reversal of 10191491 is 19419101.

10191491 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.

It is a cyclic number.

It is not a de Polignac number, because 10191491 - 2⁶ = 10191427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10191491.

It is not an unprimeable number, because it can be changed into a prime (10191421) 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, 5975 + ... + 7488.

It is an arithmetic number, because the mean of its divisors is an integer number (2551428).

Almost surely, 2^10191491 is an apocalyptic number.

10191491 is a deficient number, since it is larger than the sum of its proper divisors (14221).

10191491 is an equidigital number, since it uses as much as digits as its factorization.

10191491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14220.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 10191491 is about 3192.4114709730. The cubic root of 10191491 is about 216.8099662158.

The spelling of 10191491 in words is "ten million, one hundred ninety-one thousand, four hundred ninety-one".