989040571 has 4 divisors (see below), whose sum is σ = 989320192. Its totient is φ = 988760952.

The previous prime is 989040553. The next prime is 989040583. The reversal of 989040571 is 175040989.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989040571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989043571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134436 + ... + 141601.

It is an arithmetic number, because the mean of its divisors is an integer number (247330048).

Almost surely, 2^989040571 is an apocalyptic number.

989040571 is a deficient number, since it is larger than the sum of its proper divisors (279621).

989040571 is a wasteful number, since it uses less digits than its factorization.

989040571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279620.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 989040571 is about 31449.0154217902. The cubic root of 989040571 is about 996.3334296930. Note that the first 3 decimals are identical.

The spelling of 989040571 in words is "nine hundred eighty-nine million, forty thousand, five hundred seventy-one".