1097647 has 4 divisors (see below), whose sum is σ = 1102176. Its totient is φ = 1093120.

The previous prime is 1097633. The next prime is 1097651. The reversal of 1097647 is 7467901.

1097647 is nontrivially palindromic in base 5.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1097647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1879 + ... + 2392.

It is an arithmetic number, because the mean of its divisors is an integer number (275544).

2^1097647 is an apocalyptic number.

1097647 is a deficient number, since it is larger than the sum of its proper divisors (4529).

1097647 is an equidigital number, since it uses as much as digits as its factorization.

1097647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1097647 is about 1047.6864989108. The cubic root of 1097647 is about 103.1543543004.

The spelling of 1097647 in words is "one million, ninety-seven thousand, six hundred forty-seven".