86645761 has 4 divisors (see below), whose sum is σ = 90412992. Its totient is φ = 82878532.

The previous prime is 86645759. The next prime is 86645771. The reversal of 86645761 is 16754668.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 86645761 - 2¹ = 86645759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86645701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883581 + ... + 1883626.

It is an arithmetic number, because the mean of its divisors is an integer number (22603248).

Almost surely, 2^86645761 is an apocalyptic number.

It is an amenable number.

86645761 is a deficient number, since it is larger than the sum of its proper divisors (3767231).

86645761 is a wasteful number, since it uses less digits than its factorization.

86645761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767230.

The product of its digits is 241920, while the sum is 43.

The square root of 86645761 is about 9308.3704803795. The cubic root of 86645761 is about 442.5025456566.

The spelling of 86645761 in words is "eighty-six million, six hundred forty-five thousand, seven hundred sixty-one".