5431381447 has 2 divisors, whose sum is σ = 5431381448. Its totient is φ = 5431381446.

The previous prime is 5431381399. The next prime is 5431381451. The reversal of 5431381447 is 7441831345.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5431381447 - 2¹¹ = 5431379399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5431381457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2715690723 + 2715690724.

It is an arithmetic number, because the mean of its divisors is an integer number (2715690724).

Almost surely, 2^5431381447 is an apocalyptic number.

5431381447 is a deficient number, since it is larger than the sum of its proper divisors (1).

5431381447 is an equidigital number, since it uses as much as digits as its factorization.

5431381447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The square root of 5431381447 is about 73697.9066663362. The cubic root of 5431381447 is about 1757.8025958464.

The spelling of 5431381447 in words is "five billion, four hundred thirty-one million, three hundred eighty-one thousand, four hundred forty-seven".