86495781 has 4 divisors (see below), whose sum is σ = 115327712. Its totient is φ = 57663852.

The previous prime is 86495753. The next prime is 86495789. The reversal of 86495781 is 18759468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 86495781 - 2¹¹ = 86493733 is a prime.

It is a super-2 number, since 2×86495781² = 14963040261599922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86495781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86495789) 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 in 3 ways as a sum of consecutive naturals, for example, 14415961 + ... + 14415966.

It is an arithmetic number, because the mean of its divisors is an integer number (28831928).

Almost surely, 2^86495781 is an apocalyptic number.

It is an amenable number.

86495781 is a deficient number, since it is larger than the sum of its proper divisors (28831931).

86495781 is a wasteful number, since it uses less digits than its factorization.

86495781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28831930.

The product of its digits is 483840, while the sum is 48.

The square root of 86495781 is about 9300.3108012582. The cubic root of 86495781 is about 442.2470807213.

The spelling of 86495781 in words is "eighty-six million, four hundred ninety-five thousand, seven hundred eighty-one".