81603027 has 24 divisors (see below), whose sum is σ = 130148928. Its totient is φ = 48855600.

The previous prime is 81603023. The next prime is 81603029. The reversal of 81603027 is 72030618.

It is not a de Polignac number, because 81603027 - 2² = 81603023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81603023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3252 + ... + 13182.

It is an arithmetic number, because the mean of its divisors is an integer number (5422872).

Almost surely, 2^81603027 is an apocalyptic number.

81603027 is a deficient number, since it is larger than the sum of its proper divisors (48545901).

81603027 is a wasteful number, since it uses less digits than its factorization.

81603027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10031 (or 10028 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 81603027 is about 9033.4393782213. The cubic root of 81603027 is about 433.7459402710.

The spelling of 81603027 in words is "eighty-one million, six hundred three thousand, twenty-seven".