9897457 has 2 divisors, whose sum is σ = 9897458. Its totient is φ = 9897456.

The previous prime is 9897397. The next prime is 9897467. The reversal of 9897457 is 7547989.

It is a happy number.

9897457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9740641 + 156816 = 3121^2 + 396^2 .

It is an emirp because it is prime and its reverse (7547989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9897457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9897457.

It is not a weakly prime, because it can be changed into another prime (9897467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948728 + 4948729.

It is an arithmetic number, because the mean of its divisors is an integer number (4948729).

Almost surely, 2^9897457 is an apocalyptic number.

It is an amenable number.

9897457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9897457 is an equidigital number, since it uses as much as digits as its factorization.

9897457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The square root of 9897457 is about 3146.0224093290. The cubic root of 9897457 is about 214.7045301296.

The spelling of 9897457 in words is "nine million, eight hundred ninety-seven thousand, four hundred fifty-seven".