9972473457 has 4 divisors (see below), whose sum is σ = 13296631280. Its totient is φ = 6648315636.

The previous prime is 9972473453. The next prime is 9972473477. The reversal of 9972473457 is 7543742799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7543742799 = 3 ⋅2514580933.

It is not a de Polignac number, because 9972473457 - 2² = 9972473453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9972473397 and 9972473406.

It is not an unprimeable number, because it can be changed into a prime (9972473453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662078907 + ... + 1662078912.

It is an arithmetic number, because the mean of its divisors is an integer number (3324157820).

Almost surely, 2^9972473457 is an apocalyptic number.

It is an amenable number.

9972473457 is a deficient number, since it is larger than the sum of its proper divisors (3324157823).

9972473457 is a wasteful number, since it uses less digits than its factorization.

9972473457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324157822.

The product of its digits is 13335840, while the sum is 57.

The square root of 9972473457 is about 99862.2724405969. The cubic root of 9972473457 is about 2152.4560687952.

The spelling of 9972473457 in words is "nine billion, nine hundred seventy-two million, four hundred seventy-three thousand, four hundred fifty-seven".