81002023 has 2 divisors, whose sum is σ = 81002024. Its totient is φ = 81002022.

The previous prime is 81002003. The next prime is 81002027. The reversal of 81002023 is 32020018.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81002023 is a prime.

It is a super-2 number, since 2×81002023² = 13122655460185058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81001988 and 81002006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81002027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40501011 + 40501012.

It is an arithmetic number, because the mean of its divisors is an integer number (40501012).

Almost surely, 2^81002023 is an apocalyptic number.

81002023 is a deficient number, since it is larger than the sum of its proper divisors (1).

81002023 is an equidigital number, since it uses as much as digits as its factorization.

81002023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 81002023 is about 9000.1123881872. The cubic root of 81002023 is about 432.6784731251.

The spelling of 81002023 in words is "eighty-one million, two thousand, twenty-three".