9997570 has 16 divisors (see below), whose sum is σ = 19631808. Its totient is φ = 3635440.

The previous prime is 9997523. The next prime is 9997573. The reversal of 9997570 is 757999.

It is a self number, because there is not a number n which added to its sum of digits gives 9997570.

It is not an unprimeable number, because it can be changed into a prime (9997573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45334 + ... + 45553.

It is an arithmetic number, because the mean of its divisors is an integer number (1226988).

Almost surely, 2^9997570 is an apocalyptic number.

9997570 is a deficient number, since it is larger than the sum of its proper divisors (9634238).

9997570 is a wasteful number, since it uses less digits than its factorization.

9997570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90905.

The product of its (nonzero) digits is 178605, while the sum is 46.

The square root of 9997570 is about 3161.8934200887. The cubic root of 9997570 is about 215.4260166685.

The spelling of 9997570 in words is "nine million, nine hundred ninety-seven thousand, five hundred seventy".