2657189 has 2 divisors, whose sum is σ = 2657190. Its totient is φ = 2657188.

The previous prime is 2657173. The next prime is 2657191. The reversal of 2657189 is 9817562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2656900 + 289 = 1630^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 2657189 - 2⁴ = 2657173 is a prime.

Together with 2657191, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2657119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328594 + 1328595.

It is an arithmetic number, because the mean of its divisors is an integer number (1328595).

2^2657189 is an apocalyptic number.

It is an amenable number.

2657189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2657189 is an equidigital number, since it uses as much as digits as its factorization.

2657189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 2657189 is about 1630.0886478962. The cubic root of 2657189 is about 138.5077736778.

The spelling of 2657189 in words is "two million, six hundred fifty-seven thousand, one hundred eighty-nine".