86231573 has 2 divisors, whose sum is σ = 86231574. Its totient is φ = 86231572.

The previous prime is 86231533. The next prime is 86231591. The reversal of 86231573 is 37513268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68194564 + 18037009 = 8258^2 + 4247^2 .

It is a cyclic number.

It is not a de Polignac number, because 86231573 - 2¹⁶ = 86166037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86231503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43115786 + 43115787.

It is an arithmetic number, because the mean of its divisors is an integer number (43115787).

Almost surely, 2^86231573 is an apocalyptic number.

It is an amenable number.

86231573 is a deficient number, since it is larger than the sum of its proper divisors (1).

86231573 is an equidigital number, since it uses as much as digits as its factorization.

86231573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 86231573 is about 9286.0956811784. The cubic root of 86231573 is about 441.7963289099.

The spelling of 86231573 in words is "eighty-six million, two hundred thirty-one thousand, five hundred seventy-three".