81413474 has 8 divisors (see below), whose sum is σ = 123329628. Its totient is φ = 40303600.

The previous prime is 81413419. The next prime is 81413539. The reversal of 81413474 is 47431418.

It can be written as a sum of positive squares in 2 ways, for example, as 59182249 + 22231225 = 7693^2 + 4715^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 81413474.

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, 201317 + ... + 201720.

Almost surely, 2^81413474 is an apocalyptic number.

81413474 is a deficient number, since it is larger than the sum of its proper divisors (41916154).

81413474 is a wasteful number, since it uses less digits than its factorization.

81413474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403140.

The product of its digits is 10752, while the sum is 32.

The square root of 81413474 is about 9022.9415381016. The cubic root of 81413474 is about 433.4098351456.

The spelling of 81413474 in words is "eighty-one million, four hundred thirteen thousand, four hundred seventy-four".