823384487 has 4 divisors (see below), whose sum is σ = 826918560. Its totient is φ = 819850416.

The previous prime is 823384481. The next prime is 823384489. The reversal of 823384487 is 784483328.

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

It is a cyclic number.

It is not a de Polignac number, because 823384487 - 2¹⁸ = 823122343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823384481) 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, 1766687 + ... + 1767152.

It is an arithmetic number, because the mean of its divisors is an integer number (206729640).

Almost surely, 2^823384487 is an apocalyptic number.

823384487 is a deficient number, since it is larger than the sum of its proper divisors (3534073).

823384487 is a wasteful number, since it uses less digits than its factorization.

823384487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3534072.

The product of its digits is 1032192, while the sum is 47.

The square root of 823384487 is about 28694.6769802345. The cubic root of 823384487 is about 937.2761371739.

The spelling of 823384487 in words is "eight hundred twenty-three million, three hundred eighty-four thousand, four hundred eighty-seven".