809181053 has 2 divisors, whose sum is σ = 809181054. Its totient is φ = 809181052.

The previous prime is 809181049. The next prime is 809181067. The reversal of 809181053 is 350181908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661364089 + 147816964 = 25717^2 + 12158^2 .

It is a cyclic number.

It is not a de Polignac number, because 809181053 - 2² = 809181049 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809181013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404590526 + 404590527.

It is an arithmetic number, because the mean of its divisors is an integer number (404590527).

Almost surely, 2^809181053 is an apocalyptic number.

It is an amenable number.

809181053 is a deficient number, since it is larger than the sum of its proper divisors (1).

809181053 is an equidigital number, since it uses as much as digits as its factorization.

809181053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 809181053 is about 28446.1078708494. The cubic root of 809181053 is about 931.8554904516.

The spelling of 809181053 in words is "eight hundred nine million, one hundred eighty-one thousand, fifty-three".