85909441 has 2 divisors, whose sum is σ = 85909442. Its totient is φ = 85909440.

The previous prime is 85909433. The next prime is 85909451. The reversal of 85909441 is 14490958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48650625 + 37258816 = 6975^2 + 6104^2 .

It is a cyclic number.

It is not a de Polignac number, because 85909441 - 2³ = 85909433 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85909394 and 85909403.

It is not a weakly prime, because it can be changed into another prime (85909451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42954720 + 42954721.

It is an arithmetic number, because the mean of its divisors is an integer number (42954721).

Almost surely, 2^85909441 is an apocalyptic number.

It is an amenable number.

85909441 is a deficient number, since it is larger than the sum of its proper divisors (1).

85909441 is an equidigital number, since it uses as much as digits as its factorization.

85909441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 85909441 is about 9268.7345954019. The cubic root of 85909441 is about 441.2455085452.

The spelling of 85909441 in words is "eighty-five million, nine hundred nine thousand, four hundred forty-one".