9973015909 has 4 divisors (see below), whose sum is σ = 10075830604. Its totient is φ = 9870201216.

The previous prime is 9973015889. The next prime is 9973015939. The reversal of 9973015909 is 9095103799.

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 5055921025 + 4917094884 = 71105^2 + 70122^2 .

It is a cyclic number.

It is not a de Polignac number, because 9973015909 - 2¹¹ = 9973013861 is a prime.

It is a super-2 number, since 2×9973015909² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9973015939) 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, 51407202 + ... + 51407395.

It is an arithmetic number, because the mean of its divisors is an integer number (2518957651).

Almost surely, 2^9973015909 is an apocalyptic number.

It is an amenable number.

9973015909 is a deficient number, since it is larger than the sum of its proper divisors (102814695).

9973015909 is a wasteful number, since it uses less digits than its factorization.

9973015909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102814694.

The product of its (nonzero) digits is 688905, while the sum is 52.

The square root of 9973015909 is about 99864.9884043452. The cubic root of 9973015909 is about 2152.4950956536.

The spelling of 9973015909 in words is "nine billion, nine hundred seventy-three million, fifteen thousand, nine hundred nine".