197838423 has 16 divisors (see below), whose sum is σ = 293779200. Its totient is φ = 131583960.

The previous prime is 197838419. The next prime is 197838457. The reversal of 197838423 is 324838791.

197838423 is a `hidden beast` number, since 197 + 8 + 38 + 423 = 666.

It is not a de Polignac number, because 197838423 - 2² = 197838419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197838023) 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, 3508 + ... + 20198.

It is an arithmetic number, because the mean of its divisors is an integer number (18361200).

Almost surely, 2^197838423 is an apocalyptic number.

197838423 is a deficient number, since it is larger than the sum of its proper divisors (95940777).

197838423 is a wasteful number, since it uses less digits than its factorization.

197838423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17139 (or 17133 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 197838423 is about 14065.5047189925. The cubic root of 197838423 is about 582.6890817826.

It can be divided in two parts, 1978 and 38423, that added together give a square (40401 = 201²).

The spelling of 197838423 in words is "one hundred ninety-seven million, eight hundred thirty-eight thousand, four hundred twenty-three".