423859938442 has 4 divisors (see below), whose sum is σ = 635789907666. Its totient is φ = 211929969220.

The previous prime is 423859938433. The next prime is 423859938449. The reversal of 423859938442 is 244839958324.

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., 354859681401 + 69000257041 = 595701^2 + 262679^2 .

It is not an unprimeable number, because it can be changed into a prime (423859938449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105964984609 + ... + 105964984612.

Almost surely, 2^423859938442 is an apocalyptic number.

423859938442 is a deficient number, since it is larger than the sum of its proper divisors (211929969224).

423859938442 is a wasteful number, since it uses less digits than its factorization.

423859938442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211929969223.

The product of its digits is 59719680, while the sum is 61.

The spelling of 423859938442 in words is "four hundred twenty-three billion, eight hundred fifty-nine million, nine hundred thirty-eight thousand, four hundred forty-two".