8621961 has 8 divisors (see below), whose sum is σ = 11892480. Its totient is φ = 5549712.

The previous prime is 8621959. The next prime is 8621971. The reversal of 8621961 is 1691268.

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

It is not a de Polignac number, because 8621961 - 2¹ = 8621959 is a prime.

It is a super-2 number, since 2×8621961² = 148676422971042, which contains 22 as substring.

8621961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8621911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49465 + ... + 49638.

It is an arithmetic number, because the mean of its divisors is an integer number (1486560).

Almost surely, 2^8621961 is an apocalyptic number.

It is an amenable number.

8621961 is a deficient number, since it is larger than the sum of its proper divisors (3270519).

8621961 is a wasteful number, since it uses less digits than its factorization.

8621961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99135.

The product of its digits is 5184, while the sum is 33.

The square root of 8621961 is about 2936.3175918146. The cubic root of 8621961 is about 205.0542073583.

The spelling of 8621961 in words is "eight million, six hundred twenty-one thousand, nine hundred sixty-one".