2153657 has 4 divisors (see below), whose sum is σ = 2349456. Its totient is φ = 1957860.

The previous prime is 2153647. The next prime is 2153693. The reversal of 2153657 is 7563512.

2153657 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 2153657 - 2⁸ = 2153401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153647) 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, 97883 + ... + 97904.

It is an arithmetic number, because the mean of its divisors is an integer number (587364).

2^2153657 is an apocalyptic number.

It is an amenable number.

2153657 is a deficient number, since it is larger than the sum of its proper divisors (195799).

2153657 is a wasteful number, since it uses less digits than its factorization.

2153657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195798.

The product of its digits is 6300, while the sum is 29.

The square root of 2153657 is about 1467.5343266854. The cubic root of 2153657 is about 129.1394242004.

The spelling of 2153657 in words is "two million, one hundred fifty-three thousand, six hundred fifty-seven".