853349521 has 2 divisors, whose sum is σ = 853349522. Its totient is φ = 853349520.

The previous prime is 853349467. The next prime is 853349543. The reversal of 853349521 is 125943358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558849600 + 294499921 = 23640^2 + 17161^2 .

It is a cyclic number.

It is not a de Polignac number, because 853349521 - 2¹³ = 853341329 is a prime.

It is not a weakly prime, because it can be changed into another prime (853349551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426674760 + 426674761.

It is an arithmetic number, because the mean of its divisors is an integer number (426674761).

Almost surely, 2^853349521 is an apocalyptic number.

It is an amenable number.

853349521 is a deficient number, since it is larger than the sum of its proper divisors (1).

853349521 is an equidigital number, since it uses as much as digits as its factorization.

853349521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 853349521 is about 29212.1468057382. The cubic root of 853349521 is about 948.5108788473.

The spelling of 853349521 in words is "eight hundred fifty-three million, three hundred forty-nine thousand, five hundred twenty-one".