81004339 has 8 divisors (see below), whose sum is σ = 87561152. Its totient is φ = 74494080.

The previous prime is 81004291. The next prime is 81004349. The reversal of 81004339 is 93340018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81004339 - 2²³ = 72615731 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (81004349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7974 + ... + 15019.

It is an arithmetic number, because the mean of its divisors is an integer number (10945144).

Almost surely, 2^81004339 is an apocalyptic number.

81004339 is a deficient number, since it is larger than the sum of its proper divisors (6556813).

81004339 is a wasteful number, since it uses less digits than its factorization.

81004339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23277.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 81004339 is about 9000.2410523274. The cubic root of 81004339 is about 432.6825967825.

The spelling of 81004339 in words is "eighty-one million, four thousand, three hundred thirty-nine".