9897280541 has 4 divisors (see below), whose sum is σ = 10479473532. Its totient is φ = 9315087552.

The previous prime is 9897280529. The next prime is 9897280583. The reversal of 9897280541 is 1450827989.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3754012900 + 6143267641 = 61270^2 + 78379^2 .

It is a cyclic number.

It is not a de Polignac number, because 9897280541 - 2²² = 9893086237 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 (9897280501) 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, 291096470 + ... + 291096503.

It is an arithmetic number, because the mean of its divisors is an integer number (2619868383).

Almost surely, 2^9897280541 is an apocalyptic number.

It is an amenable number.

9897280541 is a deficient number, since it is larger than the sum of its proper divisors (582192991).

9897280541 is a wasteful number, since it uses less digits than its factorization.

9897280541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582192990.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The square root of 9897280541 is about 99485.0769763988. The cubic root of 9897280541 is about 2147.0325415293.

The spelling of 9897280541 in words is "nine billion, eight hundred ninety-seven million, two hundred eighty thousand, five hundred forty-one".