99970 has 16 divisors (see below), whose sum is σ = 194040. Its totient is φ = 36864.

The previous prime is 99961. The next prime is 99971. The reversal of 99970 is 7999.

It can be written as a sum of positive squares in 4 ways, for example, as 57121 + 42849 = 239^2 + 207^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99971) by changing a digit.

99970 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 7 ways as a sum of consecutive naturals, for example, 255 + ... + 514.

2⁹⁹⁹⁷⁰ is an apocalyptic number.

99970 is a deficient number, since it is larger than the sum of its proper divisors (94070).

99970 is a wasteful number, since it uses less digits than its factorization.

99970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 99970 is about 316.1803282938. The cubic root of 99970 is about 46.4112462831.

The spelling of 99970 in words is "ninety-nine thousand, nine hundred seventy".