9953948971 has 4 divisors (see below), whose sum is σ = 9956347632. Its totient is φ = 9951550312.

The previous prime is 9953948929. The next prime is 9953949029. The reversal of 9953948971 is 1798493599.

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

It is a cyclic number.

It is not a de Polignac number, because 9953948971 - 2¹⁷ = 9953817899 is a prime.

It is a super-2 number, since 2×9953948971² (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 (9953943971) 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, 1193095 + ... + 1201408.

It is an arithmetic number, because the mean of its divisors is an integer number (2489086908).

Almost surely, 2^9953948971 is an apocalyptic number.

9953948971 is a deficient number, since it is larger than the sum of its proper divisors (2398661).

9953948971 is a wasteful number, since it uses less digits than its factorization.

9953948971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398660.

The product of its digits is 22044960, while the sum is 64.

The square root of 9953948971 is about 99769.4791557017. The cubic root of 9953948971 is about 2151.1224692980.

The spelling of 9953948971 in words is "nine billion, nine hundred fifty-three million, nine hundred forty-eight thousand, nine hundred seventy-one".