809380101 has 4 divisors (see below), whose sum is σ = 1079173472. Its totient is φ = 539586732.

The previous prime is 809380093. The next prime is 809380153. The reversal of 809380101 is 101083908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 809380101 - 2³ = 809380093 is a prime.

It is a super-2 number, since 2×809380101² = 1310192295789540402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809380171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134896681 + ... + 134896686.

It is an arithmetic number, because the mean of its divisors is an integer number (269793368).

Almost surely, 2^809380101 is an apocalyptic number.

It is an amenable number.

809380101 is a deficient number, since it is larger than the sum of its proper divisors (269793371).

809380101 is a wasteful number, since it uses less digits than its factorization.

809380101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269793370.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 809380101 is about 28449.6063417405. The cubic root of 809380101 is about 931.9318922920.

The spelling of 809380101 in words is "eight hundred nine million, three hundred eighty thousand, one hundred one".