9997552947 has 4 divisors (see below), whose sum is σ = 13330070600. Its totient is φ = 6665035296.

The previous prime is 9997552909. The next prime is 9997552969. The reversal of 9997552947 is 7492557999.

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

It is not a de Polignac number, because 9997552947 - 2⁷ = 9997552819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9997552907) 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, 1666258822 + ... + 1666258827.

It is an arithmetic number, because the mean of its divisors is an integer number (3332517650).

Almost surely, 2^9997552947 is an apocalyptic number.

9997552947 is a deficient number, since it is larger than the sum of its proper divisors (3332517653).

9997552947 is a wasteful number, since it uses less digits than its factorization.

9997552947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332517652.

The product of its digits is 64297800, while the sum is 66.

The square root of 9997552947 is about 99987.7639863999. The cubic root of 9997552947 is about 2154.2589418332.

The spelling of 9997552947 in words is "nine billion, nine hundred ninety-seven million, five hundred fifty-two thousand, nine hundred forty-seven".