2104657 has 2 divisors, whose sum is σ = 2104658. Its totient is φ = 2104656.

The previous prime is 2104643. The next prime is 2104673. The reversal of 2104657 is 7564012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1957201 + 147456 = 1399^2 + 384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2104657 is a prime.

It is not a weakly prime, because it can be changed into another prime (2104607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052328 + 1052329.

It is an arithmetic number, because the mean of its divisors is an integer number (1052329).

2^2104657 is an apocalyptic number.

It is an amenable number.

2104657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104657 is an equidigital number, since it uses as much as digits as its factorization.

2104657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2104657 is about 1450.7436024329. The cubic root of 2104657 is about 128.1525078356.

Adding to 2104657 its reverse (7564012), we get a palindrome (9668669).

The spelling of 2104657 in words is "two million, one hundred four thousand, six hundred fifty-seven".