81260593 has 2 divisors, whose sum is σ = 81260594. Its totient is φ = 81260592.

The previous prime is 81260563. The next prime is 81260623. The reversal of 81260593 is 39506218.

It is a balanced prime because it is at equal distance from previous prime (81260563) and next prime (81260623).

It can be written as a sum of positive squares in only one way, i.e., 46131264 + 35129329 = 6792^2 + 5927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81260593 is a prime.

It is not a weakly prime, because it can be changed into another prime (81260503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40630296 + 40630297.

It is an arithmetic number, because the mean of its divisors is an integer number (40630297).

Almost surely, 2^81260593 is an apocalyptic number.

It is an amenable number.

81260593 is a deficient number, since it is larger than the sum of its proper divisors (1).

81260593 is an equidigital number, since it uses as much as digits as its factorization.

81260593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 81260593 is about 9014.4657634271. The cubic root of 81260593 is about 433.1383745619.

The spelling of 81260593 in words is "eighty-one million, two hundred sixty thousand, five hundred ninety-three".