2197387 has 2 divisors, whose sum is σ = 2197388. Its totient is φ = 2197386.

The previous prime is 2197381. The next prime is 2197409. The reversal of 2197387 is 7837912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2197387 - 2¹¹ = 2195339 is a prime.

2197387 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2197381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098693 + 1098694.

It is an arithmetic number, because the mean of its divisors is an integer number (1098694).

2^2197387 is an apocalyptic number.

2197387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197387 is an equidigital number, since it uses as much as digits as its factorization.

2197387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 2197387 is about 1482.3585935933. The cubic root of 2197387 is about 130.0076326879.

The spelling of 2197387 in words is "two million, one hundred ninety-seven thousand, three hundred eighty-seven".