989345143442 has 4 divisors (see below), whose sum is σ = 1484017715166. Its totient is φ = 494672571720.

The previous prime is 989345143421. The next prime is 989345143471. The reversal of 989345143442 is 244341543989.

It is a happy number.

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., 774912244681 + 214432898761 = 880291^2 + 463069^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247336285859 + ... + 247336285862.

Almost surely, 2^989345143442 is an apocalyptic number.

989345143442 is a deficient number, since it is larger than the sum of its proper divisors (494672571724).

989345143442 is a wasteful number, since it uses less digits than its factorization.

989345143442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494672571723.

The product of its digits is 14929920, while the sum is 56.

The spelling of 989345143442 in words is "nine hundred eighty-nine billion, three hundred forty-five million, one hundred forty-three thousand, four hundred forty-two".