822991465 has 4 divisors (see below), whose sum is σ = 987589764. Its totient is φ = 658393168.

The previous prime is 822991447. The next prime is 822991487. The reversal of 822991465 is 564199228.

822991465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161061481 + 661929984 = 12691^2 + 25728^2 .

It is a cyclic number.

It is not a de Polignac number, because 822991465 - 2²¹ = 820894313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82299142 + ... + 82299151.

It is an arithmetic number, because the mean of its divisors is an integer number (246897441).

Almost surely, 2^822991465 is an apocalyptic number.

It is an amenable number.

822991465 is a deficient number, since it is larger than the sum of its proper divisors (164598299).

822991465 is a wasteful number, since it uses less digits than its factorization.

822991465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164598298.

The product of its digits is 311040, while the sum is 46.

The square root of 822991465 is about 28687.8278194777. The cubic root of 822991465 is about 937.1269849961.

The spelling of 822991465 in words is "eight hundred twenty-two million, nine hundred ninety-one thousand, four hundred sixty-five".