998893087 has 2 divisors, whose sum is σ = 998893088. Its totient is φ = 998893086.

The previous prime is 998893057. The next prime is 998893097. The reversal of 998893087 is 780398899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998893087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998893057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499446543 + 499446544.

It is an arithmetic number, because the mean of its divisors is an integer number (499446544).

Almost surely, 2^998893087 is an apocalyptic number.

998893087 is a deficient number, since it is larger than the sum of its proper divisors (1).

998893087 is an equidigital number, since it uses as much as digits as its factorization.

998893087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 998893087 is about 31605.2699244920. The cubic root of 998893087 is about 999.6308927766.

The spelling of 998893087 in words is "nine hundred ninety-eight million, eight hundred ninety-three thousand, eighty-seven".