1897797 has 16 divisors (see below), whose sum is σ = 2787840. Its totient is φ = 1138800.

The previous prime is 1897793. The next prime is 1897801. The reversal of 1897797 is 7977981.

It is an interprime number because it is at equal distance from previous prime (1897793) and next prime (1897801).

It is not a de Polignac number, because 1897797 - 2² = 1897793 is a prime.

1897797 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4104 + ... + 4542.

It is an arithmetic number, because the mean of its divisors is an integer number (174240).

2^1897797 is an apocalyptic number.

It is an amenable number.

1897797 is a deficient number, since it is larger than the sum of its proper divisors (890043).

1897797 is a wasteful number, since it uses less digits than its factorization.

1897797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584.

The product of its digits is 222264, while the sum is 48.

The square root of 1897797 is about 1377.6055313478. The cubic root of 1897797 is about 123.8083451024.

It can be divided in two parts, 1 and 897797, that added together give a palindrome (897798).

The spelling of 1897797 in words is "one million, eight hundred ninety-seven thousand, seven hundred ninety-seven".