87390881447 has 2 divisors, whose sum is σ = 87390881448. Its totient is φ = 87390881446.

The previous prime is 87390881441. The next prime is 87390881609. The reversal of 87390881447 is 74418809378.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87390881447 - 2¹⁴ = 87390865063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87390881441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43695440723 + 43695440724.

It is an arithmetic number, because the mean of its divisors is an integer number (43695440724).

Almost surely, 2^87390881447 is an apocalyptic number.

87390881447 is a deficient number, since it is larger than the sum of its proper divisors (1).

87390881447 is an equidigital number, since it uses as much as digits as its factorization.

87390881447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 87390881447 in words is "eighty-seven billion, three hundred ninety million, eight hundred eighty-one thousand, four hundred forty-seven".