86744761 has 8 divisors (see below), whose sum is σ = 94330440. Its totient is φ = 79435008.

The previous prime is 86744731. The next prime is 86744797. The reversal of 86744761 is 16744768.

It can be written as a sum of positive squares in 4 ways, for example, as 30869136 + 55875625 = 5556^2 + 7475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86744761 - 2¹⁹ = 86220473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86744731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68326 + ... + 69583.

It is an arithmetic number, because the mean of its divisors is an integer number (11791305).

Almost surely, 2^86744761 is an apocalyptic number.

It is an amenable number.

86744761 is a deficient number, since it is larger than the sum of its proper divisors (7585679).

86744761 is a wasteful number, since it uses less digits than its factorization.

86744761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137963.

The product of its digits is 225792, while the sum is 43.

The square root of 86744761 is about 9313.6867565964. The cubic root of 86744761 is about 442.6710135171.

The spelling of 86744761 in words is "eighty-six million, seven hundred forty-four thousand, seven hundred sixty-one".