999489571 has 2 divisors, whose sum is σ = 999489572. Its totient is φ = 999489570.

The previous prime is 999489527. The next prime is 999489599. The reversal of 999489571 is 175984999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999489571 - 2¹⁵ = 999456803 is a prime.

It is not a weakly prime, because it can be changed into another prime (999483571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499744785 + 499744786.

It is an arithmetic number, because the mean of its divisors is an integer number (499744786).

Almost surely, 2^999489571 is an apocalyptic number.

999489571 is a deficient number, since it is larger than the sum of its proper divisors (1).

999489571 is an equidigital number, since it uses as much as digits as its factorization.

999489571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 61.

The square root of 999489571 is about 31614.7049804359. The cubic root of 999489571 is about 999.8298280431.

The spelling of 999489571 in words is "nine hundred ninety-nine million, four hundred eighty-nine thousand, five hundred seventy-one".