823325391 has 60 divisors (see below), whose sum is σ = 1437721032. Its totient is φ = 468169632.

The previous prime is 823325381. The next prime is 823325401. The reversal of 823325391 is 193523328.

It is an interprime number because it is at equal distance from previous prime (823325381) and next prime (823325401).

It is not a de Polignac number, because 823325391 - 2¹⁰ = 823324367 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823325381) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1122861 + ... + 1123593.

Almost surely, 2^823325391 is an apocalyptic number.

823325391 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

823325391 is a deficient number, since it is larger than the sum of its proper divisors (614395641).

823325391 is a wasteful number, since it uses less digits than its factorization.

823325391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1026 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 823325391 is about 28693.6472237323. The cubic root of 823325391 is about 937.2537132247.

The spelling of 823325391 in words is "eight hundred twenty-three million, three hundred twenty-five thousand, three hundred ninety-one".