81174339 has 8 divisors (see below), whose sum is σ = 120258320. Its totient is φ = 54116208.

The previous prime is 81174257. The next prime is 81174349. The reversal of 81174339 is 93347118.

It is a happy number.

It is not a de Polignac number, because 81174339 - 2¹³ = 81166147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81174349) 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, 1503202 + ... + 1503255.

It is an arithmetic number, because the mean of its divisors is an integer number (15032290).

Almost surely, 2^81174339 is an apocalyptic number.

81174339 is a deficient number, since it is larger than the sum of its proper divisors (39083981).

81174339 is a wasteful number, since it uses less digits than its factorization.

81174339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006466 (or 3006460 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 81174339 is about 9009.6802939949. The cubic root of 81174339 is about 432.9850688314.

The spelling of 81174339 in words is "eighty-one million, one hundred seventy-four thousand, three hundred thirty-nine".