8900861 has 2 divisors, whose sum is σ = 8900862. Its totient is φ = 8900860.

The previous prime is 8900849. The next prime is 8900863. The reversal of 8900861 is 1680098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8375236 + 525625 = 2894^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 8900861 - 2¹⁰ = 8899837 is a prime.

It is a Sophie Germain prime.

Together with 8900863, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8900863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4450430 + 4450431.

It is an arithmetic number, because the mean of its divisors is an integer number (4450431).

Almost surely, 2^8900861 is an apocalyptic number.

It is an amenable number.

8900861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8900861 is an equidigital number, since it uses as much as digits as its factorization.

8900861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 8900861 is about 2983.4310784732. The cubic root of 8900861 is about 207.2417923406.

The spelling of 8900861 in words is "eight million, nine hundred thousand, eight hundred sixty-one".