2193977 has 4 divisors (see below), whose sum is σ = 2198016. Its totient is φ = 2189940.

The previous prime is 2193973. The next prime is 2193979. The reversal of 2193977 is 7793912.

2193977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2193977 - 2² = 2193973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2193977.

It is not an unprimeable number, because it can be changed into a prime (2193973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049 + ... + 2342.

It is an arithmetic number, because the mean of its divisors is an integer number (549504).

2^2193977 is an apocalyptic number.

It is an amenable number.

2193977 is a deficient number, since it is larger than the sum of its proper divisors (4039).

2193977 is an equidigital number, since it uses as much as digits as its factorization.

2193977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038.

The product of its digits is 23814, while the sum is 38.

The square root of 2193977 is about 1481.2079529897. The cubic root of 2193977 is about 129.9403473851.

The spelling of 2193977 in words is "two million, one hundred ninety-three thousand, nine hundred seventy-seven".