81730474 has 8 divisors (see below), whose sum is σ = 140109408. Its totient is φ = 35027340.

The previous prime is 81730433. The next prime is 81730483. The reversal of 81730474 is 47403718.

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

It is a plaindrome in base 12.

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, 2918932 + ... + 2918959.

It is an arithmetic number, because the mean of its divisors is an integer number (17513676).

Almost surely, 2^81730474 is an apocalyptic number.

81730474 is a deficient number, since it is larger than the sum of its proper divisors (58378934).

81730474 is a wasteful number, since it uses less digits than its factorization.

81730474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5837900.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 81730474 is about 9040.4908052605. The cubic root of 81730474 is about 433.9716298783.

The spelling of 81730474 in words is "eighty-one million, seven hundred thirty thousand, four hundred seventy-four".