964991 has 4 divisors (see below), whose sum is σ = 1015800. Its totient is φ = 914184.

The previous prime is 964981. The next prime is 965023. The reversal of 964991 is 199469.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199469 = 173 ⋅1153.

It is a cyclic number.

It is not a de Polignac number, because 964991 - 2⁶ = 964927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 964991.

It is not an unprimeable number, because it can be changed into a prime (964981) 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, 25376 + ... + 25413.

It is an arithmetic number, because the mean of its divisors is an integer number (253950).

2⁹⁶⁴⁹⁹¹ is an apocalyptic number.

964991 is a deficient number, since it is larger than the sum of its proper divisors (50809).

964991 is a wasteful number, since it uses less digits than its factorization.

964991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50808.

The product of its digits is 17496, while the sum is 38.

The square root of 964991 is about 982.3395543294. The cubic root of 964991 is about 98.8191440117.

The spelling of 964991 in words is "nine hundred sixty-four thousand, nine hundred ninety-one".