2397657 has 4 divisors (see below), whose sum is σ = 3196880. Its totient is φ = 1598436.

The previous prime is 2397649. The next prime is 2397677. The reversal of 2397657 is 7567932.

2397657 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 not a de Polignac number, because 2397657 - 2³ = 2397649 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 3⁵ + 9⁵ + 7⁵ + 6⁸ + 5 + 7⁶ .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2397617) 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, 399607 + ... + 399612.

It is an arithmetic number, because the mean of its divisors is an integer number (799220).

2^2397657 is an apocalyptic number.

It is an amenable number.

2397657 is a deficient number, since it is larger than the sum of its proper divisors (799223).

2397657 is an equidigital number, since it uses as much as digits as its factorization.

2397657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799222.

The product of its digits is 79380, while the sum is 39.

The square root of 2397657 is about 1548.4369538344. The cubic root of 2397657 is about 133.8430069028.

The spelling of 2397657 in words is "two million, three hundred ninety-seven thousand, six hundred fifty-seven".