989043571 has 2 divisors, whose sum is σ = 989043572. Its totient is φ = 989043570.

The previous prime is 989043551. The next prime is 989043577. The reversal of 989043571 is 175340989.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989043571 - 2⁹ = 989043059 is a prime.

It is not a weakly prime, because it can be changed into another prime (989043577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494521785 + 494521786.

It is an arithmetic number, because the mean of its divisors is an integer number (494521786).

Almost surely, 2^989043571 is an apocalyptic number.

989043571 is a deficient number, since it is larger than the sum of its proper divisors (1).

989043571 is an equidigital number, since it uses as much as digits as its factorization.

989043571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 989043571 is about 31449.0631180008. The cubic root of 989043571 is about 996.3344370656.

The spelling of 989043571 in words is "nine hundred eighty-nine million, forty-three thousand, five hundred seventy-one".