9905739 has 8 divisors (see below), whose sum is σ = 13331520. Its totient is φ = 6541896.

The previous prime is 9905719. The next prime is 9905759. The reversal of 9905739 is 9375099.

It is a happy number.

9905739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9905719) and next prime (9905759).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9905739 - 2¹⁶ = 9840203 is a prime.

It is a super-2 number, since 2×9905739² = 196247330272242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9905739.

It is not an unprimeable number, because it can be changed into a prime (9905719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15109 + ... + 15750.

It is an arithmetic number, because the mean of its divisors is an integer number (1666440).

Almost surely, 2^9905739 is an apocalyptic number.

9905739 is a deficient number, since it is larger than the sum of its proper divisors (3425781).

9905739 is a wasteful number, since it uses less digits than its factorization.

9905739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30969.

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 9905739 is about 3147.3383993463. The cubic root of 9905739 is about 214.7644002951.

The spelling of 9905739 in words is "nine million, nine hundred five thousand, seven hundred thirty-nine".