81262903 has 2 divisors, whose sum is σ = 81262904. Its totient is φ = 81262902.

The previous prime is 81262897. The next prime is 81262927. The reversal of 81262903 is 30926218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81262903 - 2⁵ = 81262871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81262403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40631451 + 40631452.

It is an arithmetic number, because the mean of its divisors is an integer number (40631452).

Almost surely, 2^81262903 is an apocalyptic number.

81262903 is a deficient number, since it is larger than the sum of its proper divisors (1).

81262903 is an equidigital number, since it uses as much as digits as its factorization.

81262903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 81262903 is about 9014.5938899098. The cubic root of 81262903 is about 433.1424788070.

The spelling of 81262903 in words is "eighty-one million, two hundred sixty-two thousand, nine hundred three".