423917689 has 4 divisors (see below), whose sum is σ = 456526756. Its totient is φ = 391308624.

The previous prime is 423917687. The next prime is 423917717. The reversal of 423917689 is 986719324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 279725625 + 144192064 = 16725^2 + 12008^2 .

It is a cyclic number.

It is not a de Polignac number, because 423917689 - 2¹ = 423917687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423917687) 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, 16304514 + ... + 16304539.

It is an arithmetic number, because the mean of its divisors is an integer number (114131689).

Almost surely, 2^423917689 is an apocalyptic number.

It is an amenable number.

423917689 is a deficient number, since it is larger than the sum of its proper divisors (32609067).

423917689 is a wasteful number, since it uses less digits than its factorization.

423917689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32609066.

The product of its digits is 653184, while the sum is 49.

The square root of 423917689 is about 20589.2614971980. The cubic root of 423917689 is about 751.2085339187.

The spelling of 423917689 in words is "four hundred twenty-three million, nine hundred seventeen thousand, six hundred eighty-nine".