853274509 has 2 divisors, whose sum is σ = 853274510. Its totient is φ = 853274508.

The previous prime is 853274467. The next prime is 853274533. The reversal of 853274509 is 905472358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547794025 + 305480484 = 23405^2 + 17478^2 .

It is a cyclic number.

It is not a de Polignac number, because 853274509 - 2²¹ = 851177357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853274549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426637254 + 426637255.

It is an arithmetic number, because the mean of its divisors is an integer number (426637255).

Almost surely, 2^853274509 is an apocalyptic number.

It is an amenable number.

853274509 is a deficient number, since it is larger than the sum of its proper divisors (1).

853274509 is an equidigital number, since it uses as much as digits as its factorization.

853274509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 853274509 is about 29210.8628595596. The cubic root of 853274509 is about 948.4830857093.

The spelling of 853274509 in words is "eight hundred fifty-three million, two hundred seventy-four thousand, five hundred nine".