9720015049 has 4 divisors (see below), whose sum is σ = 9879359620. Its totient is φ = 9560670480.

The previous prime is 9720015037. The next prime is 9720015127. The reversal of 9720015049 is 9405100279.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4510062649 + 5209952400 = 67157^2 + 72180^2 .

It is a cyclic number.

It is not a de Polignac number, because 9720015049 - 2¹⁹ = 9719490761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9720014999 and 9720015017.

It is not an unprimeable number, because it can be changed into a prime (9720015449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79672194 + ... + 79672315.

It is an arithmetic number, because the mean of its divisors is an integer number (2469839905).

Almost surely, 2^9720015049 is an apocalyptic number.

It is an amenable number.

9720015049 is a deficient number, since it is larger than the sum of its proper divisors (159344571).

9720015049 is a wasteful number, since it uses less digits than its factorization.

9720015049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159344570.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 9720015049 is about 98590.1366719815. The cubic root of 9720015049 is about 2134.1370840862.

The spelling of 9720015049 in words is "nine billion, seven hundred twenty million, fifteen thousand, forty-nine".