197253865 has 16 divisors (see below), whose sum is σ = 249556608. Its totient is φ = 149377536.

The previous prime is 197253841. The next prime is 197253871. The reversal of 197253865 is 568352791.

It is a cyclic number.

It is not a de Polignac number, because 197253865 - 2²⁷ = 63036137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2314 + ... + 19996.

It is an arithmetic number, because the mean of its divisors is an integer number (15597288).

Almost surely, 2^197253865 is an apocalyptic number.

It is an amenable number.

197253865 is a deficient number, since it is larger than the sum of its proper divisors (52302743).

197253865 is a wasteful number, since it uses less digits than its factorization.

197253865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17808.

The product of its digits is 453600, while the sum is 46.

The square root of 197253865 is about 14044.7095021577. The cubic root of 197253865 is about 582.1146204184.

The spelling of 197253865 in words is "one hundred ninety-seven million, two hundred fifty-three thousand, eight hundred sixty-five".