423619691 has 4 divisors (see below), whose sum is σ = 462130584. Its totient is φ = 385108800.

The previous prime is 423619673. The next prime is 423619717. The reversal of 423619691 is 196916324.

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 423619691 - 2¹⁰ = 423618667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423619621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19255430 + ... + 19255451.

It is an arithmetic number, because the mean of its divisors is an integer number (115532646).

Almost surely, 2^423619691 is an apocalyptic number.

423619691 is a deficient number, since it is larger than the sum of its proper divisors (38510893).

423619691 is a wasteful number, since it uses less digits than its factorization.

423619691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38510892.

The product of its digits is 69984, while the sum is 41.

The square root of 423619691 is about 20582.0234913868. The cubic root of 423619691 is about 751.0324689878.

The spelling of 423619691 in words is "four hundred twenty-three million, six hundred nineteen thousand, six hundred ninety-one".