2197693 has 2 divisors, whose sum is σ = 2197694. Its totient is φ = 2197692.

The previous prime is 2197681. The next prime is 2197697. The reversal of 2197693 is 3967912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2196324 + 1369 = 1482^2 + 37^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2197693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2197697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098846 + 1098847.

It is an arithmetic number, because the mean of its divisors is an integer number (1098847).

2^2197693 is an apocalyptic number.

It is an amenable number.

2197693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197693 is an equidigital number, since it uses as much as digits as its factorization.

2197693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 37.

The square root of 2197693 is about 1482.4618038924. The cubic root of 2197693 is about 130.0136672021.

Subtracting from 2197693 its sum of digits (37), we obtain a triangular number (2197656 = T₂₀₉₆).

The spelling of 2197693 in words is "two million, one hundred ninety-seven thousand, six hundred ninety-three".