8419661 has 2 divisors, whose sum is σ = 8419662. Its totient is φ = 8419660.

The previous prime is 8419651. The next prime is 8419727. The reversal of 8419661 is 1669148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4866436 + 3553225 = 2206^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 8419661 - 2⁶ = 8419597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8419651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4209830 + 4209831.

It is an arithmetic number, because the mean of its divisors is an integer number (4209831).

Almost surely, 2^8419661 is an apocalyptic number.

It is an amenable number.

8419661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8419661 is an equidigital number, since it uses as much as digits as its factorization.

8419661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 8419661 is about 2901.6652115639. The cubic root of 8419661 is about 203.4377459504.

The spelling of 8419661 in words is "eight million, four hundred nineteen thousand, six hundred sixty-one".