10190991 has 4 divisors (see below), whose sum is σ = 13587992. Its totient is φ = 6793992.

The previous prime is 10190969. The next prime is 10191017. The reversal of 10190991 is 19909101.

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

It is not a de Polignac number, because 10190991 - 2⁵ = 10190959 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 (10190941) 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, 1698496 + ... + 1698501.

It is an arithmetic number, because the mean of its divisors is an integer number (3396998).

Almost surely, 2^10190991 is an apocalyptic number.

10190991 is a deficient number, since it is larger than the sum of its proper divisors (3397001).

10190991 is an equidigital number, since it uses as much as digits as its factorization.

10190991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397000.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 10190991 is about 3192.3331593053. Note that the first 3 decimals coincide. The cubic root of 10190991 is about 216.8064205535.

The spelling of 10190991 in words is "ten million, one hundred ninety thousand, nine hundred ninety-one".