2398661 has 2 divisors, whose sum is σ = 2398662. Its totient is φ = 2398660.

The previous prime is 2398657. The next prime is 2398679. The reversal of 2398661 is 1668932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2356225 + 42436 = 1535^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 2398661 - 2² = 2398657 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2²¹ + 3⁹ + 9² + 8³ + 6⁴ + 6⁷ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2398681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1199330 + 1199331.

It is an arithmetic number, because the mean of its divisors is an integer number (1199331).

2^2398661 is an apocalyptic number.

It is an amenable number.

2398661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2398661 is an equidigital number, since it uses as much as digits as its factorization.

2398661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 2398661 is about 1548.7611177971. The cubic root of 2398661 is about 133.8616861978.

The spelling of 2398661 in words is "two million, three hundred ninety-eight thousand, six hundred sixty-one".