89999999942 has 4 divisors (see below), whose sum is σ = 134999999916. Its totient is φ = 44999999970.

The previous prime is 89999999939. The next prime is 89999999981. The reversal of 89999999942 is 24999999998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24999999998 = 2 ⋅12499999999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22499999984 + ... + 22499999987.

It is an arithmetic number, because the mean of its divisors is an integer number (33749999979).

Almost surely, 2^89999999942 is an apocalyptic number.

89999999942 is a deficient number, since it is larger than the sum of its proper divisors (44999999974).

89999999942 is a wasteful number, since it uses less digits than its factorization.

89999999942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44999999973.

The product of its digits is 2754990144, while the sum is 86.

The spelling of 89999999942 in words is "eighty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-two".