86949621 has 12 divisors (see below), whose sum is σ = 137011680. Its totient is φ = 52696680.

The previous prime is 86949619. The next prime is 86949631. The reversal of 86949621 is 12694968.

It is a happy number.

It is not a de Polignac number, because 86949621 - 2¹ = 86949619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86949601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439041 + ... + 439238.

It is an arithmetic number, because the mean of its divisors is an integer number (11417640).

Almost surely, 2^86949621 is an apocalyptic number.

It is an amenable number.

86949621 is a deficient number, since it is larger than the sum of its proper divisors (50062059).

86949621 is a wasteful number, since it uses less digits than its factorization.

86949621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878296 (or 878293 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 86949621 is about 9324.6780641478. The cubic root of 86949621 is about 443.0192162495.

The spelling of 86949621 in words is "eighty-six million, nine hundred forty-nine thousand, six hundred twenty-one".