9970 has 8 divisors (see below), whose sum is σ = 17964.
Its totient is φ = 3984.
The previous prime is 9967. The next prime is 9973. The reversal of 9970 is 799.
It can be divided in two parts, 99 and 70, that added together give a square (169 = 132).
It is an interprime number because it is at equal distance from previous prime (9967) and next prime (9973).
It can be written as a sum of positive squares in 2 ways, for example, as 9801 + 169 = 99^2 + 13^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is a plaindrome in base 13.
It is a nialpdrome in base 10 and base 11.
It is not an unprimeable number, because it can be changed into a prime (9973) 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, 489 + ... + 508.
29970 is an apocalyptic number.
9970 is a deficient number, since it is larger than the sum of its proper divisors (7994).
9970 is a wasteful number, since it uses less digits than its factorization.
9970 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1004.
The product of its (nonzero) digits is 567, while the sum is 25.
The square root of 9970 is about 99.8498873309.
The cubic root of 9970 is about 21.5227809731.
The spelling of 9970 in words is "nine thousand, nine hundred seventy".