897257747 has 8 divisors (see below), whose sum is σ = 909258240. Its totient is φ = 885273480.

The previous prime is 897257719. The next prime is 897257759. The reversal of 897257747 is 747752798.

It is a happy number.

897257747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 897257747 - 2¹⁴ = 897241363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 897257692 and 897257701.

It is not an unprimeable number, because it can be changed into a prime (897257797) 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, 141548 + ... + 147750.

It is an arithmetic number, because the mean of its divisors is an integer number (113657280).

Almost surely, 2^897257747 is an apocalyptic number.

897257747 is a deficient number, since it is larger than the sum of its proper divisors (12000493).

897257747 is a wasteful number, since it uses less digits than its factorization.

897257747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8113.

The product of its digits is 6914880, while the sum is 56.

The square root of 897257747 is about 29954.2609156026. The cubic root of 897257747 is about 964.5077883938.

The spelling of 897257747 in words is "eight hundred ninety-seven million, two hundred fifty-seven thousand, seven hundred forty-seven".