885649621 has 2 divisors, whose sum is σ = 885649622. Its totient is φ = 885649620.

The previous prime is 885649559. The next prime is 885649637. The reversal of 885649621 is 126946588.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 880308900 + 5340721 = 29670^2 + 2311^2 .

It is a cyclic number.

It is not a de Polignac number, because 885649621 - 2¹¹ = 885647573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (885649691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442824810 + 442824811.

It is an arithmetic number, because the mean of its divisors is an integer number (442824811).

Almost surely, 2^885649621 is an apocalyptic number.

It is an amenable number.

885649621 is a deficient number, since it is larger than the sum of its proper divisors (1).

885649621 is an equidigital number, since it uses as much as digits as its factorization.

885649621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 49.

The square root of 885649621 is about 29759.8659439185. The cubic root of 885649621 is about 960.3303337302.

The spelling of 885649621 in words is "eight hundred eighty-five million, six hundred forty-nine thousand, six hundred twenty-one".