816377439 has 8 divisors (see below), whose sum is σ = 1088767152. Its totient is φ = 544119680.

The previous prime is 816377413. The next prime is 816377453. The reversal of 816377439 is 934773618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 816377439 - 2⁸ = 816377183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816377039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17514 + ... + 44039.

It is an arithmetic number, because the mean of its divisors is an integer number (136095894).

Almost surely, 2^816377439 is an apocalyptic number.

816377439 is a deficient number, since it is larger than the sum of its proper divisors (272389713).

816377439 is a wasteful number, since it uses less digits than its factorization.

816377439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65977.

The product of its digits is 762048, while the sum is 48.

The square root of 816377439 is about 28572.3194543250. The cubic root of 816377439 is about 934.6098018188.

The spelling of 816377439 in words is "eight hundred sixteen million, three hundred seventy-seven thousand, four hundred thirty-nine".