81023603 has 2 divisors, whose sum is σ = 81023604. Its totient is φ = 81023602.

The previous prime is 81023597. The next prime is 81023609. The reversal of 81023603 is 30632018.

It is a balanced prime because it is at equal distance from previous prime (81023597) and next prime (81023609).

It is a cyclic number.

It is not a de Polignac number, because 81023603 - 2²² = 76829299 is a prime.

It is not a weakly prime, because it can be changed into another prime (81023609) 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 as a sum of consecutive naturals, namely, 40511801 + 40511802.

It is an arithmetic number, because the mean of its divisors is an integer number (40511802).

Almost surely, 2^81023603 is an apocalyptic number.

81023603 is a deficient number, since it is larger than the sum of its proper divisors (1).

81023603 is an equidigital number, since it uses as much as digits as its factorization.

81023603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 81023603 is about 9001.3111822667. The cubic root of 81023603 is about 432.7168934510.

The spelling of 81023603 in words is "eighty-one million, twenty-three thousand, six hundred three".