9997942 has 4 divisors (see below), whose sum is σ = 14996916. Its totient is φ = 4998970.

The previous prime is 9997937. The next prime is 9997951. The reversal of 9997942 is 2497999.

9997942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499484 + ... + 2499487.

It is an arithmetic number, because the mean of its divisors is an integer number (3749229).

Almost surely, 2^9997942 is an apocalyptic number.

9997942 is a deficient number, since it is larger than the sum of its proper divisors (4998974).

9997942 is a wasteful number, since it uses less digits than its factorization.

9997942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998973.

The product of its digits is 367416, while the sum is 49.

The square root of 9997942 is about 3161.9522450537. The cubic root of 9997942 is about 215.4286885672.

The spelling of 9997942 in words is "nine million, nine hundred ninety-seven thousand, nine hundred forty-two".