9742939 has 4 divisors (see below), whose sum is σ = 9888424. Its totient is φ = 9597456.

The previous prime is 9742903. The next prime is 9742963. The reversal of 9742939 is 9392479.

9742939 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, and also an emirpimes, since its reverse is a distinct semiprime: 9392479 = 19 ⋅494341.

It is a cyclic number.

It is not a de Polignac number, because 9742939 - 2⁹ = 9742427 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9742895 and 9742904.

It is not an unprimeable number, because it can be changed into a prime (9742969) 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, 72642 + ... + 72775.

It is an arithmetic number, because the mean of its divisors is an integer number (2472106).

Almost surely, 2^9742939 is an apocalyptic number.

9742939 is a deficient number, since it is larger than the sum of its proper divisors (145485).

9742939 is a wasteful number, since it uses less digits than its factorization.

9742939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145484.

The product of its digits is 122472, while the sum is 43.

The square root of 9742939 is about 3121.3681295227. The cubic root of 9742939 is about 213.5813502750.

The spelling of 9742939 in words is "nine million, seven hundred forty-two thousand, nine hundred thirty-nine".