623440197 has 24 divisors (see below), whose sum is σ = 919900800. Its totient is φ = 406747968.

The previous prime is 623440189. The next prime is 623440199. The reversal of 623440197 is 791044326.

623440197 is a `hidden beast` number, since 6 + 23 + 440 + 197 = 666.

It is not a de Polignac number, because 623440197 - 2³ = 623440189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623440199) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 121204 + ... + 126242.

It is an arithmetic number, because the mean of its divisors is an integer number (38329200).

Almost surely, 2^623440197 is an apocalyptic number.

It is an amenable number.

623440197 is a deficient number, since it is larger than the sum of its proper divisors (296460603).

623440197 is a wasteful number, since it uses less digits than its factorization.

623440197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337 (or 5334 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 623440197 is about 24968.7844517910. The cubic root of 623440197 is about 854.2761206598.

The spelling of 623440197 in words is "six hundred twenty-three million, four hundred forty thousand, one hundred ninety-seven".