16197925 has 6 divisors (see below), whose sum is σ = 20085458. Its totient is φ = 12958320.

The previous prime is 16197917. The next prime is 16197947. The reversal of 16197925 is 52979161.

It can be written as a sum of positive squares in 3 ways, for example, as 2067844 + 14130081 = 1438^2 + 3759^2 .

It is not a de Polignac number, because 16197925 - 2³ = 16197917 is a prime.

It is a super-3 number, since 3×16197925³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323934 + ... + 323983.

Almost surely, 2^16197925 is an apocalyptic number.

It is an amenable number.

16197925 is a deficient number, since it is larger than the sum of its proper divisors (3887533).

16197925 is an equidigital number, since it uses as much as digits as its factorization.

16197925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647927 (or 647922 counting only the distinct ones).

The product of its digits is 34020, while the sum is 40.

The square root of 16197925 is about 4024.6645822975. The cubic root of 16197925 is about 253.0189959022.

The spelling of 16197925 in words is "sixteen million, one hundred ninety-seven thousand, nine hundred twenty-five".