2381657 has 2 divisors, whose sum is σ = 2381658. Its totient is φ = 2381656.

The previous prime is 2381651. The next prime is 2381677. The reversal of 2381657 is 7561832.

It is a happy number.

2381657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2238016 + 143641 = 1496^2 + 379^2 .

It is a cyclic number.

It is not a de Polignac number, because 2381657 - 2¹⁰ = 2380633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2381651) 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 as a sum of consecutive naturals, namely, 1190828 + 1190829.

It is an arithmetic number, because the mean of its divisors is an integer number (1190829).

2^2381657 is an apocalyptic number.

It is an amenable number.

2381657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2381657 is an equidigital number, since it uses as much as digits as its factorization.

2381657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 2381657 is about 1543.2618053979. The cubic root of 2381657 is about 133.5446226382.

The spelling of 2381657 in words is "two million, three hundred eighty-one thousand, six hundred fifty-seven".