8999961 has 8 divisors (see below), whose sum is σ = 12022560. Its totient is φ = 5988672.

The previous prime is 8999957. The next prime is 8999971. The reversal of 8999961 is 1699998.

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

It is not a de Polignac number, because 8999961 - 2² = 8999957 is a prime.

8999961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8999971) 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, 751 + ... + 4308.

It is an arithmetic number, because the mean of its divisors is an integer number (1502820).

Almost surely, 2^8999961 is an apocalyptic number.

It is an amenable number.

8999961 is a deficient number, since it is larger than the sum of its proper divisors (3022599).

8999961 is a wasteful number, since it uses less digits than its factorization.

8999961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5655.

The product of its digits is 314928, while the sum is 51.

The square root of 8999961 is about 2999.9934999930. The cubic root of 8999961 is about 208.0080818482.

The spelling of 8999961 in words is "eight million, nine hundred ninety-nine thousand, nine hundred sixty-one".