8919961 has 4 divisors (see below), whose sum is σ = 8929152. Its totient is φ = 8910772.

The previous prime is 8919959. The next prime is 8919979. The reversal of 8919961 is 1699198.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1699198 = 2 ⋅849599.

It is a cyclic number.

It is not a de Polignac number, because 8919961 - 2¹ = 8919959 is a prime.

It is a Duffinian number.

8919961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8919901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2941 + ... + 5146.

It is an arithmetic number, because the mean of its divisors is an integer number (2232288).

Almost surely, 2^8919961 is an apocalyptic number.

It is an amenable number.

8919961 is a deficient number, since it is larger than the sum of its proper divisors (9191).

8919961 is a wasteful number, since it uses less digits than its factorization.

8919961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9190.

The product of its digits is 34992, while the sum is 43.

The square root of 8919961 is about 2986.6303755236. The cubic root of 8919961 is about 207.3899237132.

The spelling of 8919961 in words is "eight million, nine hundred nineteen thousand, nine hundred sixty-one".