85358021 has 4 divisors (see below), whose sum is σ = 97552032. Its totient is φ = 73164012.

The previous prime is 85358017. The next prime is 85358033. The reversal of 85358021 is 12085358.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85358021 - 2² = 85358017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85358011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6096995 + ... + 6097008.

It is an arithmetic number, because the mean of its divisors is an integer number (24388008).

Almost surely, 2^85358021 is an apocalyptic number.

It is an amenable number.

85358021 is a deficient number, since it is larger than the sum of its proper divisors (12194011).

85358021 is a wasteful number, since it uses less digits than its factorization.

85358021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12194010.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 85358021 is about 9238.9404695560. The cubic root of 85358021 is about 440.2994191335.

The spelling of 85358021 in words is "eighty-five million, three hundred fifty-eight thousand, twenty-one".