85360921 has 2 divisors, whose sum is σ = 85360922. Its totient is φ = 85360920.

The previous prime is 85360909. The next prime is 85360937. The reversal of 85360921 is 12906358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84842521 + 518400 = 9211^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 85360921 - 2⁹ = 85360409 is a prime.

It is not a weakly prime, because it can be changed into another prime (85360721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42680460 + 42680461.

It is an arithmetic number, because the mean of its divisors is an integer number (42680461).

Almost surely, 2^85360921 is an apocalyptic number.

It is an amenable number.

85360921 is a deficient number, since it is larger than the sum of its proper divisors (1).

85360921 is an equidigital number, since it uses as much as digits as its factorization.

85360921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 85360921 is about 9239.0974126264. The cubic root of 85360921 is about 440.3044054013.

The spelling of 85360921 in words is "eighty-five million, three hundred sixty thousand, nine hundred twenty-one".