86943643477 has 2 divisors, whose sum is σ = 86943643478. Its totient is φ = 86943643476.

The previous prime is 86943643463. The next prime is 86943643487. The reversal of 86943643477 is 77434634968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73785029956 + 13158613521 = 271634^2 + 114711^2 .

It is a cyclic number.

It is not a de Polignac number, because 86943643477 - 2²⁷ = 86809425749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86943643447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43471821738 + 43471821739.

It is an arithmetic number, because the mean of its divisors is an integer number (43471821739).

Almost surely, 2^86943643477 is an apocalyptic number.

It is an amenable number.

86943643477 is a deficient number, since it is larger than the sum of its proper divisors (1).

86943643477 is an equidigital number, since it uses as much as digits as its factorization.

86943643477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 61.

The spelling of 86943643477 in words is "eighty-six billion, nine hundred forty-three million, six hundred forty-three thousand, four hundred seventy-seven".