81202603 has 4 divisors (see below), whose sum is σ = 81266040. Its totient is φ = 81139168.

The previous prime is 81202601. The next prime is 81202607. The reversal of 81202603 is 30620218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81202603 - 2¹ = 81202601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81202601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29758 + ... + 32371.

It is an arithmetic number, because the mean of its divisors is an integer number (20316510).

Almost surely, 2^81202603 is an apocalyptic number.

81202603 is a deficient number, since it is larger than the sum of its proper divisors (63437).

81202603 is a wasteful number, since it uses less digits than its factorization.

81202603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63436.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 81202603 is about 9011.2486926064. The cubic root of 81202603 is about 433.0353165248.

The spelling of 81202603 in words is "eighty-one million, two hundred two thousand, six hundred three".