1697143 has 4 divisors (see below), whose sum is σ = 1939600. Its totient is φ = 1454688.

The previous prime is 1697107. The next prime is 1697149. The reversal of 1697143 is 3417961.

It is a happy number.

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-1697143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1697149) 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, 121218 + ... + 121231.

It is an arithmetic number, because the mean of its divisors is an integer number (484900).

2^1697143 is an apocalyptic number.

1697143 is a deficient number, since it is larger than the sum of its proper divisors (242457).

1697143 is an equidigital number, since it uses as much as digits as its factorization.

1697143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242456.

The product of its digits is 4536, while the sum is 31.

The square root of 1697143 is about 1302.7444108496. The cubic root of 1697143 is about 119.2814232435.

The spelling of 1697143 in words is "one million, six hundred ninety-seven thousand, one hundred forty-three".