889999999942 has 4 divisors (see below), whose sum is σ = 1334999999916. Its totient is φ = 444999999970.

The previous prime is 889999999919. The next prime is 889999999949. The reversal of 889999999942 is 249999999988.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889999999949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222499999984 + ... + 222499999987.

It is an arithmetic number, because the mean of its divisors is an integer number (333749999979).

Almost surely, 2^889999999942 is an apocalyptic number.

889999999942 is a deficient number, since it is larger than the sum of its proper divisors (444999999974).

889999999942 is a wasteful number, since it uses less digits than its factorization.

889999999942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444999999973.

The product of its digits is 22039921152, while the sum is 94.

The spelling of 889999999942 in words is "eight hundred eighty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-two".