9799942 has 4 divisors (see below), whose sum is σ = 14699916. Its totient is φ = 4899970.

The previous prime is 9799927. The next prime is 9799957. The reversal of 9799942 is 2499979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2499979 = 37 ⋅67567.

It is an interprime number because it is at equal distance from previous prime (9799927) and next prime (9799957).

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 an Ulam 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, 2449984 + ... + 2449987.

It is an arithmetic number, because the mean of its divisors is an integer number (3674979).

Almost surely, 2^9799942 is an apocalyptic number.

9799942 is a deficient number, since it is larger than the sum of its proper divisors (4899974).

9799942 is a wasteful number, since it uses less digits than its factorization.

9799942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899973.

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

The square root of 9799942 is about 3130.4859047758. The cubic root of 9799942 is about 213.9970739403.

The spelling of 9799942 in words is "nine million, seven hundred ninety-nine thousand, nine hundred forty-two".