2398657 has 2 divisors, whose sum is σ = 2398658. Its totient is φ = 2398656.

The previous prime is 2398637. The next prime is 2398661. The reversal of 2398657 is 7568932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2027776 + 370881 = 1424^2 + 609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2398657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2398607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1199328 + 1199329.

It is an arithmetic number, because the mean of its divisors is an integer number (1199329).

2^2398657 is an apocalyptic number.

It is an amenable number.

2398657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2398657 is an equidigital number, since it uses as much as digits as its factorization.

2398657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 2398657 is about 1548.7598264418. The cubic root of 2398657 is about 133.8616117886.

The spelling of 2398657 in words is "two million, three hundred ninety-eight thousand, six hundred fifty-seven".