99700 has 18 divisors (see below), whose sum is σ = 216566. Its totient is φ = 39840.

The previous prime is 99689. The next prime is 99707. The reversal of 99700 is 799.

It can be written as a sum of positive squares in 3 ways, for example, as 19044 + 80656 = 138^2 + 284^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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 (99707) by changing a digit.

99700 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399 + ... + 598.

2⁹⁹⁷⁰⁰ is an apocalyptic number.

99700 is the 200-th heptagonal number.

It is an amenable number.

99700 is an abundant number, since it is smaller than the sum of its proper divisors (116866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99700 is a wasteful number, since it uses less digits than its factorization.

99700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 99700 is about 315.7530680769. The cubic root of 99700 is about 46.3694259544.

The spelling of 99700 in words is "ninety-nine thousand, seven hundred".