423782197 has 4 divisors (see below), whose sum is σ = 423843840. Its totient is φ = 423720556.

The previous prime is 423782179. The next prime is 423782209. The reversal of 423782197 is 791287324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423782197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423782297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18997 + ... + 34762.

It is an arithmetic number, because the mean of its divisors is an integer number (105960960).

Almost surely, 2^423782197 is an apocalyptic number.

It is an amenable number.

423782197 is a deficient number, since it is larger than the sum of its proper divisors (61643).

423782197 is an equidigital number, since it uses as much as digits as its factorization.

423782197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61642.

The product of its digits is 169344, while the sum is 43.

The square root of 423782197 is about 20585.9708782462. The cubic root of 423782197 is about 751.1284919710.

The spelling of 423782197 in words is "four hundred twenty-three million, seven hundred eighty-two thousand, one hundred ninety-seven".