16191023 has 8 divisors (see below), whose sum is σ = 16901136. Its totient is φ = 15496000.

The previous prime is 16191001. The next prime is 16191029. The reversal of 16191023 is 32019161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16191023 - 2⁸ = 16190767 is a prime.

It is a super-3 number, since 3×16191023³ (a number of 23 digits) contains 333 as substring.

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 16191023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16191029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1553 + ... + 5898.

It is an arithmetic number, because the mean of its divisors is an integer number (2112642).

Almost surely, 2^16191023 is an apocalyptic number.

16191023 is a deficient number, since it is larger than the sum of its proper divisors (710113).

16191023 is an equidigital number, since it uses as much as digits as its factorization.

16191023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 16191023 is about 4023.8070281762. The cubic root of 16191023 is about 252.9830533312.

The spelling of 16191023 in words is "sixteen million, one hundred ninety-one thousand, twenty-three".