2193857 has 4 divisors (see below), whose sum is σ = 2210736. Its totient is φ = 2176980.

The previous prime is 2193853. The next prime is 2193881. The reversal of 2193857 is 7583912.

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 2193857 - 2² = 2193853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2193853) 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, 8243 + ... + 8504.

It is an arithmetic number, because the mean of its divisors is an integer number (552684).

2^2193857 is an apocalyptic number.

It is an amenable number.

2193857 is a deficient number, since it is larger than the sum of its proper divisors (16879).

2193857 is a wasteful number, since it uses less digits than its factorization.

2193857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16878.

The product of its digits is 15120, while the sum is 35.

The square root of 2193857 is about 1481.1674449568. The cubic root of 2193857 is about 129.9379783043.

The spelling of 2193857 in words is "two million, one hundred ninety-three thousand, eight hundred fifty-seven".