9956807973 has 24 divisors (see below), whose sum is σ = 16442731968. Its totient is φ = 5687494272.

The previous prime is 9956807951. The next prime is 9956807981. The reversal of 9956807973 is 3797086599.

It is not a de Polignac number, because 9956807973 - 2¹³ = 9956799781 is a prime.

It is a super-2 number, since 2×9956807973² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 9956807973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9956807923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150586 + ... + 206372.

It is an arithmetic number, because the mean of its divisors is an integer number (685113832).

Almost surely, 2^9956807973 is an apocalyptic number.

It is an amenable number.

9956807973 is a deficient number, since it is larger than the sum of its proper divisors (6485923995).

9956807973 is a wasteful number, since it uses less digits than its factorization.

9956807973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58633 (or 58630 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 63.

The square root of 9956807973 is about 99783.8061661310. The cubic root of 9956807973 is about 2151.3284001214.

The spelling of 9956807973 in words is "nine billion, nine hundred fifty-six million, eight hundred seven thousand, nine hundred seventy-three".