423899986 has 4 divisors (see below), whose sum is σ = 635849982. Its totient is φ = 211949992.

The previous prime is 423899923. The next prime is 423899999. The reversal of 423899986 is 689998324.

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

It can be written as a sum of positive squares in only one way, i.e., 286658761 + 137241225 = 16931^2 + 11715^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 423899986.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105974995 + ... + 105974998.

Almost surely, 2^423899986 is an apocalyptic number.

423899986 is a deficient number, since it is larger than the sum of its proper divisors (211949996).

423899986 is a wasteful number, since it uses less digits than its factorization.

423899986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211949995.

The product of its digits is 6718464, while the sum is 58.

The square root of 423899986 is about 20588.8315841380. The cubic root of 423899986 is about 751.1980768338.

The spelling of 423899986 in words is "four hundred twenty-three million, eight hundred ninety-nine thousand, nine hundred eighty-six".