623047321 has 4 divisors (see below), whose sum is σ = 670974052. Its totient is φ = 575120592.

The previous prime is 623047319. The next prime is 623047343. The reversal of 623047321 is 123740326.

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

It can be written as a sum of positive squares in 2 ways, for example, as 112784400 + 510262921 = 10620^2 + 22589^2 .

It is a cyclic number.

It is not a de Polignac number, because 623047321 - 2¹ = 623047319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623047321.

It is not an unprimeable number, because it can be changed into a prime (623047361) 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, 23963346 + ... + 23963371.

It is an arithmetic number, because the mean of its divisors is an integer number (167743513).

Almost surely, 2^623047321 is an apocalyptic number.

It is an amenable number.

623047321 is a deficient number, since it is larger than the sum of its proper divisors (47926731).

623047321 is a wasteful number, since it uses less digits than its factorization.

623047321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47926730.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 623047321 is about 24960.9158686135. The cubic root of 623047321 is about 854.0966353287.

Adding to 623047321 its reverse (123740326), we get a palindrome (746787647).

The spelling of 623047321 in words is "six hundred twenty-three million, forty-seven thousand, three hundred twenty-one".