623497321 has 8 divisors (see below), whose sum is σ = 660592800. Its totient is φ = 586448448.

The previous prime is 623497319. The next prime is 623497337. The reversal of 623497321 is 123794326.

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 623497321 - 2¹ = 623497319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623497921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18090 + ... + 39676.

It is an arithmetic number, because the mean of its divisors is an integer number (82574100).

Almost surely, 2^623497321 is an apocalyptic number.

It is an amenable number.

623497321 is a deficient number, since it is larger than the sum of its proper divisors (37095479).

623497321 is a wasteful number, since it uses less digits than its factorization.

623497321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23303.

The product of its digits is 54432, while the sum is 37.

The square root of 623497321 is about 24969.9283338980. The cubic root of 623497321 is about 854.3022114696.

The spelling of 623497321 in words is "six hundred twenty-three million, four hundred ninety-seven thousand, three hundred twenty-one".