9942949 has 4 divisors (see below), whose sum is σ = 9965164. Its totient is φ = 9920736.

The previous prime is 9942941. The next prime is 9943057. The reversal of 9942949 is 9492499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9492499 = 199 ⋅47701.

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 1050625 = 2982^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 9942949 - 2³ = 9942941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9942899 and 9942908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9942941) 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, 10422 + ... + 11335.

It is an arithmetic number, because the mean of its divisors is an integer number (2491291).

Almost surely, 2^9942949 is an apocalyptic number.

It is an amenable number.

9942949 is a deficient number, since it is larger than the sum of its proper divisors (22215).

9942949 is a wasteful number, since it uses less digits than its factorization.

9942949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22214.

The product of its digits is 209952, while the sum is 46.

The square root of 9942949 is about 3153.2442024049. The cubic root of 9942949 is about 215.0329785359.

The spelling of 9942949 in words is "nine million, nine hundred forty-two thousand, nine hundred forty-nine".