98887661 has 4 divisors (see below), whose sum is σ = 99666432. Its totient is φ = 98108892.

The previous prime is 98887639. The next prime is 98887669. The reversal of 98887661 is 16678889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 98887661 - 2⁶ = 98887597 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98887669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389195 + ... + 389448.

It is an arithmetic number, because the mean of its divisors is an integer number (24916608).

Almost surely, 2^98887661 is an apocalyptic number.

It is an amenable number.

98887661 is a deficient number, since it is larger than the sum of its proper divisors (778771).

98887661 is a wasteful number, since it uses less digits than its factorization.

98887661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778770.

The product of its digits is 1161216, while the sum is 53.

The square root of 98887661 is about 9944.2275215323. The cubic root of 98887661 is about 462.4314557295.

The spelling of 98887661 in words is "ninety-eight million, eight hundred eighty-seven thousand, six hundred sixty-one".