8405271493 has 2 divisors, whose sum is σ = 8405271494. Its totient is φ = 8405271492.

The previous prime is 8405271437. The next prime is 8405271499. The reversal of 8405271493 is 3941725048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7749809089 + 655462404 = 88033^2 + 25602^2 .

It is a cyclic number.

It is not a de Polignac number, because 8405271493 - 2¹⁷ = 8405140421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8405271499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202635746 + 4202635747.

It is an arithmetic number, because the mean of its divisors is an integer number (4202635747).

Almost surely, 2^8405271493 is an apocalyptic number.

It is an amenable number.

8405271493 is a deficient number, since it is larger than the sum of its proper divisors (1).

8405271493 is an equidigital number, since it uses as much as digits as its factorization.

8405271493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 8405271493 is about 91680.2677406649. The cubic root of 8405271493 is about 2033.2178569524.

The spelling of 8405271493 in words is "eight billion, four hundred five million, two hundred seventy-one thousand, four hundred ninety-three".