86861479 has 2 divisors, whose sum is σ = 86861480. Its totient is φ = 86861478.

The previous prime is 86861447. The next prime is 86861491. The reversal of 86861479 is 97416868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86861479 - 2⁵ = 86861447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86861779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43430739 + 43430740.

It is an arithmetic number, because the mean of its divisors is an integer number (43430740).

Almost surely, 2^86861479 is an apocalyptic number.

86861479 is a deficient number, since it is larger than the sum of its proper divisors (1).

86861479 is an equidigital number, since it uses as much as digits as its factorization.

86861479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 86861479 is about 9319.9505899978. The cubic root of 86861479 is about 442.8694674584.

The spelling of 86861479 in words is "eighty-six million, eight hundred sixty-one thousand, four hundred seventy-nine".