9725539 has 2 divisors, whose sum is σ = 9725540. Its totient is φ = 9725538.

The previous prime is 9725531. The next prime is 9725563. The reversal of 9725539 is 9355279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9725539 - 2³ = 9725531 is a prime.

It is a super-2 number, since 2×9725539² = 189172217681042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9725531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4862769 + 4862770.

It is an arithmetic number, because the mean of its divisors is an integer number (4862770).

Almost surely, 2^9725539 is an apocalyptic number.

9725539 is a deficient number, since it is larger than the sum of its proper divisors (1).

9725539 is an equidigital number, since it uses as much as digits as its factorization.

9725539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 40.

The square root of 9725539 is about 3118.5796446459. The cubic root of 9725539 is about 213.4541289090.

The spelling of 9725539 in words is "nine million, seven hundred twenty-five thousand, five hundred thirty-nine".