81734374 has 8 divisors (see below), whose sum is σ = 124914960. Its totient is φ = 40096056.

The previous prime is 81734353. The next prime is 81734399. The reversal of 81734374 is 47343718.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385434 + ... + 385645.

It is an arithmetic number, because the mean of its divisors is an integer number (15614370).

Almost surely, 2^81734374 is an apocalyptic number.

81734374 is a deficient number, since it is larger than the sum of its proper divisors (43180586).

81734374 is a wasteful number, since it uses less digits than its factorization.

81734374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771134.

The product of its digits is 56448, while the sum is 37.

The square root of 81734374 is about 9040.7064989413. The cubic root of 81734374 is about 433.9785324952.

The spelling of 81734374 in words is "eighty-one million, seven hundred thirty-four thousand, three hundred seventy-four".