9970138 has 4 divisors (see below), whose sum is σ = 14955210. Its totient is φ = 4985068.

The previous prime is 9970123. The next prime is 9970139. The reversal of 9970138 is 8310799.

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., 9815689 + 154449 = 3133^2 + 393^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9970097 and 9970106.

It is not an unprimeable number, because it can be changed into a prime (9970139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2492533 + ... + 2492536.

Almost surely, 2^9970138 is an apocalyptic number.

9970138 is a deficient number, since it is larger than the sum of its proper divisors (4985072).

9970138 is a wasteful number, since it uses less digits than its factorization.

9970138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985071.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 9970138 is about 3157.5525332130. The cubic root of 9970138 is about 215.2288027533.

Adding to 9970138 its product of nonzero digits (13608), we get a triangular number (9983746 = T₄₄₆₈).

The spelling of 9970138 in words is "nine million, nine hundred seventy thousand, one hundred thirty-eight".