897533947 has 2 divisors, whose sum is σ = 897533948. Its totient is φ = 897533946.

The previous prime is 897533929. The next prime is 897533953. The reversal of 897533947 is 749335798.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897533947 is a prime.

It is not a weakly prime, because it can be changed into another prime (897533927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448766973 + 448766974.

It is an arithmetic number, because the mean of its divisors is an integer number (448766974).

Almost surely, 2^897533947 is an apocalyptic number.

897533947 is a deficient number, since it is larger than the sum of its proper divisors (1).

897533947 is an equidigital number, since it uses as much as digits as its factorization.

897533947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 55.

The square root of 897533947 is about 29958.8709233175. The cubic root of 897533947 is about 964.6067453628.

The spelling of 897533947 in words is "eight hundred ninety-seven million, five hundred thirty-three thousand, nine hundred forty-seven".