9397557481 has 9 divisors (see below), whose sum is σ = 10177418181. Its totient is φ = 8673505152.

The previous prime is 9397557473. The next prime is 9397557497. The reversal of 9397557481 is 1847557939.

The square root of 9397557481 is 96941.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2949467481 + 6448090000 = 54309^2 + 80300^2 .

It is not a de Polignac number, because 9397557481 - 2³ = 9397557473 is a prime.

It is a super-2 number, since 2×9397557481² (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 (9397587481) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1256505 + ... + 1263961.

Almost surely, 2^9397557481 is an apocalyptic number.

9397557481 is the 96941-st square number.

9397557481 is the 48471-st centered octagonal number.

It is an amenable number.

9397557481 is a deficient number, since it is larger than the sum of its proper divisors (779860700).

9397557481 is an frugal number, since it uses more digits than its factorization.

9397557481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14940 (or 7470 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 58.

The cubic root of 9397557481 is about 2110.2714834526.

The spelling of 9397557481 in words is "nine billion, three hundred ninety-seven million, five hundred fifty-seven thousand, four hundred eighty-one".