81709314 has 32 divisors (see below), whose sum is σ = 166594560. Its totient is φ = 26710992.

The previous prime is 81709307. The next prime is 81709321. The reversal of 81709314 is 41390718.

It is an interprime number because it is at equal distance from previous prime (81709307) and next prime (81709321).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176247 + ... + 176709.

It is an arithmetic number, because the mean of its divisors is an integer number (5206080).

Almost surely, 2^81709314 is an apocalyptic number.

81709314 is an abundant number, since it is smaller than the sum of its proper divisors (84885246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81709314 is a wasteful number, since it uses less digits than its factorization.

81709314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 81709314 is about 9039.3204390596. The cubic root of 81709314 is about 433.9341749290.

The spelling of 81709314 in words is "eighty-one million, seven hundred nine thousand, three hundred fourteen".