809933401369 has 27 divisors (see below), whose sum is σ = 868300993693. Its totient is φ = 755335346048.

The previous prime is 809933401363. The next prime is 809933401439. The reversal of 809933401369 is 963104339908.

The square root of 809933401369 is 899963.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 50002773769 + 759930627600 = 223613^2 + 871740^2 .

It is not a de Polignac number, because 809933401369 - 2¹³ = 809933393177 is a prime.

It is a super-2 number, since 2×809933401369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809933401363) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2554994799 + ... + 2554995115.

Almost surely, 2^809933401369 is an apocalyptic number.

809933401369 is the 899963-rd square number.

809933401369 is the 449982-nd centered octagonal number.

It is an amenable number.

809933401369 is a deficient number, since it is larger than the sum of its proper divisors (58367592324).

809933401369 is an frugal number, since it uses more digits than its factorization.

809933401369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 55.

The spelling of 809933401369 in words is "eight hundred nine billion, nine hundred thirty-three million, four hundred one thousand, three hundred sixty-nine".