16191197 has 8 divisors (see below), whose sum is σ = 17700672. Its totient is φ = 14688000.

The previous prime is 16191179. The next prime is 16191223. The reversal of 16191197 is 79119161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16191197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16191107) 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, 5072 + ... + 7622.

It is an arithmetic number, because the mean of its divisors is an integer number (2212584).

Almost surely, 2^16191197 is an apocalyptic number.

It is an amenable number.

16191197 is a deficient number, since it is larger than the sum of its proper divisors (1509475).

16191197 is a wasteful number, since it uses less digits than its factorization.

16191197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139.

The product of its digits is 3402, while the sum is 35.

The square root of 16191197 is about 4023.8286494333. The cubic root of 16191197 is about 252.9839595719.

The spelling of 16191197 in words is "sixteen million, one hundred ninety-one thousand, one hundred ninety-seven".