2657623 has 4 divisors (see below), whose sum is σ = 2672488. Its totient is φ = 2642760.

The previous prime is 2657617. The next prime is 2657651. The reversal of 2657623 is 3267562.

2657623 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.

It is a cyclic number.

It is not a de Polignac number, because 2657623 - 2⁵ = 2657591 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 6⁴ + 5⁹ + 7³ + 6⁴ + 2¹⁹ + 3¹¹ .

It is a Duffinian number.

2657623 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2657023) 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, 7161 + ... + 7522.

It is an arithmetic number, because the mean of its divisors is an integer number (668122).

2^2657623 is an apocalyptic number.

2657623 is a deficient number, since it is larger than the sum of its proper divisors (14865).

2657623 is a wasteful number, since it uses less digits than its factorization.

2657623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14864.

The product of its digits is 15120, while the sum is 31.

The square root of 2657623 is about 1630.2217640554. The cubic root of 2657623 is about 138.5153141151.

The spelling of 2657623 in words is "two million, six hundred fifty-seven thousand, six hundred twenty-three".