86745621 has 8 divisors (see below), whose sum is σ = 121748320. Its totient is φ = 54786672.

The previous prime is 86745619. The next prime is 86745623. The reversal of 86745621 is 12654768.

It is an interprime number because it is at equal distance from previous prime (86745619) and next prime (86745623).

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

It is not a de Polignac number, because 86745621 - 2¹ = 86745619 is a prime.

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 86745621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86745623) 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, 760870 + ... + 760983.

It is an arithmetic number, because the mean of its divisors is an integer number (15218540).

Almost surely, 2^86745621 is an apocalyptic number.

It is an amenable number.

86745621 is a deficient number, since it is larger than the sum of its proper divisors (35002699).

86745621 is a wasteful number, since it uses less digits than its factorization.

86745621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521875.

The product of its digits is 80640, while the sum is 39.

The square root of 86745621 is about 9313.7329250951. The cubic root of 86745621 is about 442.6724764135.

The spelling of 86745621 in words is "eighty-six million, seven hundred forty-five thousand, six hundred twenty-one".