8861961 has 8 divisors (see below), whose sum is σ = 12437920. Its totient is φ = 5596992.

The previous prime is 8861929. The next prime is 8861987. The reversal of 8861961 is 1691688.

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

It is not a de Polignac number, because 8861961 - 2⁵ = 8861929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8861911) 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, 77680 + ... + 77793.

It is an arithmetic number, because the mean of its divisors is an integer number (1554740).

Almost surely, 2^8861961 is an apocalyptic number.

It is an amenable number.

8861961 is a deficient number, since it is larger than the sum of its proper divisors (3575959).

8861961 is a wasteful number, since it uses less digits than its factorization.

8861961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155495.

The product of its digits is 20736, while the sum is 39.

The square root of 8861961 is about 2976.9046004197. The cubic root of 8861961 is about 206.9394441178.

The spelling of 8861961 in words is "eight million, eight hundred sixty-one thousand, nine hundred sixty-one".