86427973 has 2 divisors, whose sum is σ = 86427974. Its totient is φ = 86427972.

The previous prime is 86427961. The next prime is 86427977. The reversal of 86427973 is 37972468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85710564 + 717409 = 9258^2 + 847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86427973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86427977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43213986 + 43213987.

It is an arithmetic number, because the mean of its divisors is an integer number (43213987).

Almost surely, 2^86427973 is an apocalyptic number.

It is an amenable number.

86427973 is a deficient number, since it is larger than the sum of its proper divisors (1).

86427973 is an equidigital number, since it uses as much as digits as its factorization.

86427973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 86427973 is about 9296.6646169473. The cubic root of 86427973 is about 442.1314846024.

The spelling of 86427973 in words is "eighty-six million, four hundred twenty-seven thousand, nine hundred seventy-three".