9809739 has 12 divisors (see below), whose sum is σ = 14198496. Its totient is φ = 6526512.

The previous prime is 9809711. The next prime is 9809741. The reversal of 9809739 is 9379089.

It is a happy number.

It is not a de Polignac number, because 9809739 - 2¹² = 9805643 is a prime.

9809739 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9809694 and 9809703.

It is not an unprimeable number, because it can be changed into a prime (9809749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5854 + ... + 7340.

It is an arithmetic number, because the mean of its divisors is an integer number (1183208).

Almost surely, 2^9809739 is an apocalyptic number.

9809739 is a deficient number, since it is larger than the sum of its proper divisors (4388757).

9809739 is a wasteful number, since it uses less digits than its factorization.

9809739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226 (or 2223 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 9809739 is about 3132.0502869526. The cubic root of 9809739 is about 214.0683611339.

The spelling of 9809739 in words is "nine million, eight hundred nine thousand, seven hundred thirty-nine".