919961 has 8 divisors (see below), whose sum is σ = 1106880. Its totient is φ = 746928.

The previous prime is 919951. The next prime is 919969. The reversal of 919961 is 169919.

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

It is a de Polignac number, because none of the positive numbers 2^k-919961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919969) 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, 3326 + ... + 3591.

It is an arithmetic number, because the mean of its divisors is an integer number (138360).

2⁹¹⁹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

919961 is a deficient number, since it is larger than the sum of its proper divisors (186919).

919961 is a wasteful number, since it uses less digits than its factorization.

919961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6943.

The product of its digits is 4374, while the sum is 35.

The square root of 919961 is about 959.1459742917. The cubic root of 919961 is about 97.2575082922.

The spelling of 919961 in words is "nine hundred nineteen thousand, nine hundred sixty-one".