9964728539 has 8 divisors (see below), whose sum is σ = 10200260400. Its totient is φ = 9729369216.

The previous prime is 9964728523. The next prime is 9964728589. The reversal of 9964728539 is 9358274699.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9964728539 - 2⁴ = 9964728523 is a prime.

It is a super-2 number, since 2×9964728539² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9964728509) 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, 77687 + ... + 161135.

It is an arithmetic number, because the mean of its divisors is an integer number (1275032550).

Almost surely, 2^9964728539 is an apocalyptic number.

9964728539 is a deficient number, since it is larger than the sum of its proper divisors (235531861).

9964728539 is a wasteful number, since it uses less digits than its factorization.

9964728539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86269.

The product of its digits is 29393280, while the sum is 62.

The square root of 9964728539 is about 99823.4869106464. The cubic root of 9964728539 is about 2151.8987041216.

The spelling of 9964728539 in words is "nine billion, nine hundred sixty-four million, seven hundred twenty-eight thousand, five hundred thirty-nine".