823513164 has 24 divisors (see below), whose sum is σ = 1933323840. Its totient is φ = 272819664.

The previous prime is 823513157. The next prime is 823513169. The reversal of 823513164 is 461315328.

It is not an unprimeable number, because it can be changed into a prime (823513169) 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, 208554 + ... + 212465.

It is an arithmetic number, because the mean of its divisors is an integer number (80555160).

Almost surely, 2^823513164 is an apocalyptic number.

It is an amenable number.

823513164 is an abundant number, since it is smaller than the sum of its proper divisors (1109810676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

823513164 is a wasteful number, since it uses less digits than its factorization.

823513164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421189 (or 421187 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 823513164 is about 28696.9190680812. The cubic root of 823513164 is about 937.3249598893.

The spelling of 823513164 in words is "eight hundred twenty-three million, five hundred thirteen thousand, one hundred sixty-four".