197426865 has 16 divisors (see below), whose sum is σ = 334464768. Its totient is φ = 99100416.

The previous prime is 197426863. The next prime is 197426869. The reversal of 197426865 is 568624791.

It is not a de Polignac number, because 197426865 - 2¹ = 197426863 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197426861) 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, 386857 + ... + 387366.

It is an arithmetic number, because the mean of its divisors is an integer number (20904048).

Almost surely, 2^197426865 is an apocalyptic number.

197426865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197426865 is a deficient number, since it is larger than the sum of its proper divisors (137037903).

197426865 is a wasteful number, since it uses less digits than its factorization.

197426865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774248.

The product of its digits is 725760, while the sum is 48.

The square root of 197426865 is about 14050.8670550966. The cubic root of 197426865 is about 582.2847504225.

The spelling of 197426865 in words is "one hundred ninety-seven million, four hundred twenty-six thousand, eight hundred sixty-five".