853221307 has 2 divisors, whose sum is σ = 853221308. Its totient is φ = 853221306.

The previous prime is 853221301. The next prime is 853221311. The reversal of 853221307 is 703122358.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853221307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (853221301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426610653 + 426610654.

It is an arithmetic number, because the mean of its divisors is an integer number (426610654).

Almost surely, 2^853221307 is an apocalyptic number.

853221307 is a deficient number, since it is larger than the sum of its proper divisors (1).

853221307 is an equidigital number, since it uses as much as digits as its factorization.

853221307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 853221307 is about 29209.9521909913. The cubic root of 853221307 is about 948.4633725356.

The spelling of 853221307 in words is "eight hundred fifty-three million, two hundred twenty-one thousand, three hundred seven".