9725739 has 8 divisors (see below), whose sum is σ = 13650240. Its totient is φ = 6142536.

The previous prime is 9725731. The next prime is 9725741. The reversal of 9725739 is 9375279.

9725739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9725739 - 2³ = 9725731 is a prime.

It is a super-2 number, since 2×9725739² = 189179998192242, 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 9725739.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9725731) 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, 85257 + ... + 85370.

It is an arithmetic number, because the mean of its divisors is an integer number (1706280).

Almost surely, 2^9725739 is an apocalyptic number.

9725739 is a deficient number, since it is larger than the sum of its proper divisors (3924501).

9725739 is a wasteful number, since it uses less digits than its factorization.

9725739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170649.

The product of its digits is 119070, while the sum is 42.

The square root of 9725739 is about 3118.6117103609. The cubic root of 9725739 is about 213.4555920852.

The spelling of 9725739 in words is "nine million, seven hundred twenty-five thousand, seven hundred thirty-nine".