9897572 has 6 divisors (see below), whose sum is σ = 17320758. Its totient is φ = 4948784.

The previous prime is 9897571. The next prime is 9897581. The reversal of 9897572 is 2757989.

It can be written as a sum of positive squares in only one way, i.e., 9897316 + 256 = 3146^2 + 16^2 .

It is not an unprimeable number, because it can be changed into a prime (9897571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1237193 + ... + 1237200.

It is an arithmetic number, because the mean of its divisors is an integer number (2886793).

Almost surely, 2^9897572 is an apocalyptic number.

It is an amenable number.

9897572 is a deficient number, since it is larger than the sum of its proper divisors (7423186).

9897572 is a wasteful number, since it uses less digits than its factorization.

9897572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474397 (or 2474395 counting only the distinct ones).

The product of its digits is 317520, while the sum is 47.

The square root of 9897572 is about 3146.0406863230. The cubic root of 9897572 is about 214.7053616875.

The spelling of 9897572 in words is "nine million, eight hundred ninety-seven thousand, five hundred seventy-two".