885517421 has 2 divisors, whose sum is σ = 885517422. Its totient is φ = 885517420.

The previous prime is 885517393. The next prime is 885517483. The reversal of 885517421 is 124715588.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 701508196 + 184009225 = 26486^2 + 13565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-885517421 is a prime.

It is a super-2 number, since 2×885517421² = 1568282205788982482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (885517121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442758710 + 442758711.

It is an arithmetic number, because the mean of its divisors is an integer number (442758711).

Almost surely, 2^885517421 is an apocalyptic number.

It is an amenable number.

885517421 is a deficient number, since it is larger than the sum of its proper divisors (1).

885517421 is an equidigital number, since it uses as much as digits as its factorization.

885517421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89600, while the sum is 41.

The square root of 885517421 is about 29757.6447488708. The cubic root of 885517421 is about 960.2825488484.

The spelling of 885517421 in words is "eight hundred eighty-five million, five hundred seventeen thousand, four hundred twenty-one".