820731423 has 8 divisors (see below), whose sum is σ = 1158679728. Its totient is φ = 514968704.

The previous prime is 820731421. The next prime is 820731427. The reversal of 820731423 is 324137028.

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 820731423 - 2¹ = 820731421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820731421) 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, 8046336 + ... + 8046437.

It is an arithmetic number, because the mean of its divisors is an integer number (144834966).

Almost surely, 2^820731423 is an apocalyptic number.

820731423 is a deficient number, since it is larger than the sum of its proper divisors (337948305).

820731423 is a wasteful number, since it uses less digits than its factorization.

820731423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16092793.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 820731423 is about 28648.4104794664. The cubic root of 820731423 is about 936.2683742175.

The spelling of 820731423 in words is "eight hundred twenty million, seven hundred thirty-one thousand, four hundred twenty-three".