423684187 has 4 divisors (see below), whose sum is σ = 423928456. Its totient is φ = 423439920.

The previous prime is 423684139. The next prime is 423684197. The reversal of 423684187 is 781486324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423684187 - 2²³ = 415295579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423684197) 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 3 ways as a sum of consecutive naturals, for example, 119514 + ... + 123007.

It is an arithmetic number, because the mean of its divisors is an integer number (105982114).

Almost surely, 2^423684187 is an apocalyptic number.

423684187 is a deficient number, since it is larger than the sum of its proper divisors (244269).

423684187 is a wasteful number, since it uses less digits than its factorization.

423684187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244268.

The product of its digits is 258048, while the sum is 43.

The square root of 423684187 is about 20583.5902359137. The cubic root of 423684187 is about 751.0705818936.

The spelling of 423684187 in words is "four hundred twenty-three million, six hundred eighty-four thousand, one hundred eighty-seven".