98987818 has 4 divisors (see below), whose sum is σ = 148481730. Its totient is φ = 49493908.

The previous prime is 98987813. The next prime is 98987827. The reversal of 98987818 is 81878989.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 89359209 + 9628609 = 9453^2 + 3103^2 .

It is a super-2 number, since 2×98987818² = 19597176224802248, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (98987813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24746953 + ... + 24746956.

Almost surely, 2^98987818 is an apocalyptic number.

98987818 is a deficient number, since it is larger than the sum of its proper divisors (49493912).

98987818 is a wasteful number, since it uses less digits than its factorization.

98987818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49493911.

The product of its digits is 2322432, while the sum is 58.

The square root of 98987818 is about 9949.2621836999. The cubic root of 98987818 is about 462.5875254854.

The spelling of 98987818 in words is "ninety-eight million, nine hundred eighty-seven thousand, eight hundred eighteen".