853221377 has 2 divisors, whose sum is σ = 853221378. Its totient is φ = 853221376.

The previous prime is 853221331. The next prime is 853221389. The reversal of 853221377 is 773122358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 853165681 + 55696 = 29209^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 853221377 - 2²⁶ = 786112513 is a prime.

It is a super-2 number, since 2×853221377² = 1455973436339552258, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 853221377.

It is not a weakly prime, because it can be changed into another prime (853221307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426610688 + 426610689.

It is an arithmetic number, because the mean of its divisors is an integer number (426610689).

Almost surely, 2^853221377 is an apocalyptic number.

It is an amenable number.

853221377 is a deficient number, since it is larger than the sum of its proper divisors (1).

853221377 is an equidigital number, since it uses as much as digits as its factorization.

853221377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 38.

The square root of 853221377 is about 29209.9533892131. The cubic root of 853221377 is about 948.4633984735.

The spelling of 853221377 in words is "eight hundred fifty-three million, two hundred twenty-one thousand, three hundred seventy-seven".