8081409 has 16 divisors (see below), whose sum is σ = 13039488. Its totient is φ = 4346112.

The previous prime is 8081399. The next prime is 8081419. The reversal of 8081409 is 9041808.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8081399) and next prime (8081419).

It is not a de Polignac number, because 8081409 - 2⁸ = 8081153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10962 + ... + 11675.

It is an arithmetic number, because the mean of its divisors is an integer number (814968).

It is a Proth number, since it is equal to 1973 ⋅ 2¹² + 1 and 1973 < 2¹².

Almost surely, 2^8081409 is an apocalyptic number.

It is an amenable number.

8081409 is a deficient number, since it is larger than the sum of its proper divisors (4958079).

8081409 is a wasteful number, since it uses less digits than its factorization.

8081409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22664.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8081409 is about 2842.7819121417. The cubic root of 8081409 is about 200.6761200659.

The spelling of 8081409 in words is "eight million, eighty-one thousand, four hundred nine".