2389661 has 2 divisors, whose sum is σ = 2389662. Its totient is φ = 2389660.

The previous prime is 2389657. The next prime is 2389663. The reversal of 2389661 is 1669832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2280100 + 109561 = 1510^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2389661 - 2² = 2389657 is a prime.

Together with 2389663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2389663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194830 + 1194831.

It is an arithmetic number, because the mean of its divisors is an integer number (1194831).

2^2389661 is an apocalyptic number.

It is an amenable number.

2389661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2389661 is an equidigital number, since it uses as much as digits as its factorization.

2389661 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 2389661 is about 1545.8528390503. The cubic root of 2389661 is about 133.6940558533.

The spelling of 2389661 in words is "two million, three hundred eighty-nine thousand, six hundred sixty-one".