196505997 has 16 divisors (see below), whose sum is σ = 274034688. Its totient is φ = 125017200.

The previous prime is 196505987. The next prime is 196506007. The reversal of 196505997 is 799505691.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (196505987) and next prime (196506007).

It is a de Polignac number, because none of the positive numbers 2^k-196505997 is a prime.

It is a super-2 number, since 2×196505997² = 77229213713928018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196505917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28872 + ... + 35022.

It is an arithmetic number, because the mean of its divisors is an integer number (17127168).

Almost surely, 2^196505997 is an apocalyptic number.

It is an amenable number.

196505997 is a deficient number, since it is larger than the sum of its proper divisors (77528691).

196505997 is a wasteful number, since it uses less digits than its factorization.

196505997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6640.

The product of its (nonzero) digits is 765450, while the sum is 51.

The square root of 196505997 is about 14018.0596731502. The cubic root of 196505997 is about 581.3780125495.

The spelling of 196505997 in words is "one hundred ninety-six million, five hundred five thousand, nine hundred ninety-seven".