86451787 has 2 divisors, whose sum is σ = 86451788. Its totient is φ = 86451786.

The previous prime is 86451763. The next prime is 86451853. The reversal of 86451787 is 78715468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86451787 - 2²³ = 78063179 is a prime.

It is a super-2 number, since 2×86451787² = 14947822950986738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86451727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43225893 + 43225894.

It is an arithmetic number, because the mean of its divisors is an integer number (43225894).

Almost surely, 2^86451787 is an apocalyptic number.

86451787 is a deficient number, since it is larger than the sum of its proper divisors (1).

86451787 is an equidigital number, since it uses as much as digits as its factorization.

86451787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376320, while the sum is 46.

The square root of 86451787 is about 9297.9453106587. The cubic root of 86451787 is about 442.1720885563.

The spelling of 86451787 in words is "eighty-six million, four hundred fifty-one thousand, seven hundred eighty-seven".