9913642 has 4 divisors (see below), whose sum is σ = 14870466. Its totient is φ = 4956820.

The previous prime is 9913637. The next prime is 9913643. The reversal of 9913642 is 2463199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2463199 = 887 ⋅2777.

It can be written as a sum of positive squares in only one way, i.e., 8173881 + 1739761 = 2859^2 + 1319^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9913598 and 9913607.

It is not an unprimeable number, because it can be changed into a prime (9913643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2478409 + ... + 2478412.

Almost surely, 2^9913642 is an apocalyptic number.

9913642 is a deficient number, since it is larger than the sum of its proper divisors (4956824).

9913642 is a wasteful number, since it uses less digits than its factorization.

9913642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4956823.

The product of its digits is 11664, while the sum is 34.

The square root of 9913642 is about 3148.5936543162. The cubic root of 9913642 is about 214.8214995813.

The spelling of 9913642 in words is "nine million, nine hundred thirteen thousand, six hundred forty-two".