2197657 has 8 divisors (see below), whose sum is σ = 2740032. Its totient is φ = 1712400.

The previous prime is 2197651. The next prime is 2197681. The reversal of 2197657 is 7567912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2197657 is a prime.

It is a pancake number, because a pancake can be divided into 2197657 parts by 2096 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2197651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14194 + ... + 14347.

It is an arithmetic number, because the mean of its divisors is an integer number (342504).

2^2197657 is an apocalyptic number.

It is an amenable number.

2197657 is a deficient number, since it is larger than the sum of its proper divisors (542375).

2197657 is a wasteful number, since it uses less digits than its factorization.

2197657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28559.

The product of its digits is 26460, while the sum is 37.

The square root of 2197657 is about 1482.4496618773. The cubic root of 2197657 is about 130.0129572884.

The spelling of 2197657 in words is "two million, one hundred ninety-seven thousand, six hundred fifty-seven".