998888587 has 2 divisors, whose sum is σ = 998888588. Its totient is φ = 998888586.

The previous prime is 998888573. The next prime is 998888591. The reversal of 998888587 is 785888899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998888587 is a prime.

It is not a weakly prime, because it can be changed into another prime (998888987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499444293 + 499444294.

It is an arithmetic number, because the mean of its divisors is an integer number (499444294).

Almost surely, 2^998888587 is an apocalyptic number.

998888587 is a deficient number, since it is larger than the sum of its proper divisors (1).

998888587 is an equidigital number, since it uses as much as digits as its factorization.

998888587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92897280, while the sum is 70.

The square root of 998888587 is about 31605.1987337526. The cubic root of 998888587 is about 999.6293916664.

The spelling of 998888587 in words is "nine hundred ninety-eight million, eight hundred eighty-eight thousand, five hundred eighty-seven".