86728305431 has 2 divisors, whose sum is σ = 86728305432. Its totient is φ = 86728305430.

The previous prime is 86728305379. The next prime is 86728305437. The reversal of 86728305431 is 13450382768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86728305431 - 2¹⁴ = 86728289047 is a prime.

It is a super-2 number, since 2×86728305431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86728305437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43364152715 + 43364152716.

It is an arithmetic number, because the mean of its divisors is an integer number (43364152716).

Almost surely, 2^86728305431 is an apocalyptic number.

86728305431 is a deficient number, since it is larger than the sum of its proper divisors (1).

86728305431 is an equidigital number, since it uses as much as digits as its factorization.

86728305431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 86728305431 in words is "eighty-six billion, seven hundred twenty-eight million, three hundred five thousand, four hundred thirty-one".