81460599 has 16 divisors (see below), whose sum is σ = 119919744. Its totient is φ = 48773600.

The previous prime is 81460597. The next prime is 81460601. The reversal of 81460599 is 99506418.

It is an interprime number because it is at equal distance from previous prime (81460597) and next prime (81460601).

It is a cyclic number.

It is not a de Polignac number, because 81460599 - 2¹ = 81460597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81460599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81460597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12132 + ... + 17609.

It is an arithmetic number, because the mean of its divisors is an integer number (7494984).

Almost surely, 2^81460599 is an apocalyptic number.

81460599 is a deficient number, since it is larger than the sum of its proper divisors (38459145).

81460599 is a wasteful number, since it uses less digits than its factorization.

81460599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29838.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 81460599 is about 9025.5525592620. The cubic root of 81460599 is about 433.4934433329.

The spelling of 81460599 in words is "eighty-one million, four hundred sixty thousand, five hundred ninety-nine".