998665087 has 8 divisors (see below), whose sum is σ = 1141776000. Its totient is φ = 855665304.

The previous prime is 998665079. The next prime is 998665097. The reversal of 998665087 is 780566899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998665087 - 2³ = 998665079 is a prime.

It is a pancake number, because a pancake can be divided into 998665087 parts by 44691 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998665097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7537 + ... + 45322.

It is an arithmetic number, because the mean of its divisors is an integer number (142722000).

Almost surely, 2^998665087 is an apocalyptic number.

998665087 is a deficient number, since it is larger than the sum of its proper divisors (143110913).

998665087 is a wasteful number, since it uses less digits than its factorization.

998665087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55565.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The square root of 998665087 is about 31601.6627252428. The cubic root of 998665087 is about 999.5548308538.

The spelling of 998665087 in words is "nine hundred ninety-eight million, six hundred sixty-five thousand, eighty-seven".