9702471997 has 4 divisors (see below), whose sum is σ = 9723519036. Its totient is φ = 9681424960.

The previous prime is 9702471973. The next prime is 9702472069. The reversal of 9702471997 is 7991742079.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7991742079 = 347 ⋅23030957.

It can be written as a sum of positive squares in 2 ways, for example, as 1676820601 + 8025651396 = 40949^2 + 89586^2 .

It is a cyclic number.

It is not a de Polignac number, because 9702471997 - 2²³ = 9694083389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9702471907) 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, 10522828 + ... + 10523749.

It is an arithmetic number, because the mean of its divisors is an integer number (2430879759).

Almost surely, 2^9702471997 is an apocalyptic number.

It is an amenable number.

9702471997 is a deficient number, since it is larger than the sum of its proper divisors (21047039).

9702471997 is a wasteful number, since it uses less digits than its factorization.

9702471997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21047038.

The product of its (nonzero) digits is 2000376, while the sum is 55.

The square root of 9702471997 is about 98501.1268818789. The cubic root of 9702471997 is about 2132.8523870219.

The spelling of 9702471997 in words is "nine billion, seven hundred two million, four hundred seventy-one thousand, nine hundred ninety-seven".