788409823 has 4 divisors (see below), whose sum is σ = 790490440. Its totient is φ = 786329208.

The previous prime is 788409761. The next prime is 788409851. The reversal of 788409823 is 328904887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328904887 = 79 ⋅4163353.

It is a cyclic number.

It is not a de Polignac number, because 788409823 - 2¹³ = 788401631 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 (788406823) 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, 1039740 + ... + 1040497.

It is an arithmetic number, because the mean of its divisors is an integer number (197622610).

Almost surely, 2^788409823 is an apocalyptic number.

788409823 is a deficient number, since it is larger than the sum of its proper divisors (2080617).

788409823 is a wasteful number, since it uses less digits than its factorization.

788409823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080616.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 788409823 is about 28078.6364163219. The cubic root of 788409823 is about 923.8128712679.

The spelling of 788409823 in words is "seven hundred eighty-eight million, four hundred nine thousand, eight hundred twenty-three".