81475603 has 8 divisors (see below), whose sum is σ = 88950960. Its totient is φ = 74011680.

The previous prime is 81475601. The next prime is 81475619. The reversal of 81475603 is 30657418.

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

It is a cyclic number.

It is not a de Polignac number, because 81475603 - 2¹ = 81475601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81475601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20113 + ... + 23821.

It is an arithmetic number, because the mean of its divisors is an integer number (11118870).

Almost surely, 2^81475603 is an apocalyptic number.

81475603 is a deficient number, since it is larger than the sum of its proper divisors (7475357).

81475603 is a wasteful number, since it uses less digits than its factorization.

81475603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 81475603 is about 9026.3837166387. The cubic root of 81475603 is about 433.5200563475.

The spelling of 81475603 in words is "eighty-one million, four hundred seventy-five thousand, six hundred three".