81988303 has 2 divisors, whose sum is σ = 81988304. Its totient is φ = 81988302.

The previous prime is 81988243. The next prime is 81988321. The reversal of 81988303 is 30388918.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81988303 - 2¹³ = 81980111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81983303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40994151 + 40994152.

It is an arithmetic number, because the mean of its divisors is an integer number (40994152).

Almost surely, 2^81988303 is an apocalyptic number.

81988303 is a deficient number, since it is larger than the sum of its proper divisors (1).

81988303 is an equidigital number, since it uses as much as digits as its factorization.

81988303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 81988303 is about 9054.7392563232. The cubic root of 81988303 is about 434.4274901149.

The spelling of 81988303 in words is "eighty-one million, nine hundred eighty-eight thousand, three hundred three".