81003474 has 48 divisors (see below), whose sum is σ = 179397504. Its totient is φ = 26409600.

The previous prime is 81003463. The next prime is 81003509. The reversal of 81003474 is 47430018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 307867 + ... + 308129.

It is an arithmetic number, because the mean of its divisors is an integer number (3737448).

Almost surely, 2^81003474 is an apocalyptic number.

81003474 is an abundant number, since it is smaller than the sum of its proper divisors (98394030).

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

81003474 is a wasteful number, since it uses less digits than its factorization.

81003474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 81003474 is about 9000.1929979307. The cubic root of 81003474 is about 432.6810566519.

The spelling of 81003474 in words is "eighty-one million, three thousand, four hundred seventy-four".