623016321 has 4 divisors (see below), whose sum is σ = 830688432. Its totient is φ = 415344212.

The previous prime is 623016319. The next prime is 623016371. The reversal of 623016321 is 123610326.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 623016321 - 2¹ = 623016319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 623016291 and 623016300.

It is not an unprimeable number, because it can be changed into a prime (623016371) 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, 103836051 + ... + 103836056.

It is an arithmetic number, because the mean of its divisors is an integer number (207672108).

Almost surely, 2^623016321 is an apocalyptic number.

It is an amenable number.

623016321 is a deficient number, since it is larger than the sum of its proper divisors (207672111).

623016321 is a wasteful number, since it uses less digits than its factorization.

623016321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207672110.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 623016321 is about 24960.2948900849. The cubic root of 623016321 is about 854.0824697729.

Adding to 623016321 its reverse (123610326), we get a palindrome (746626647).

The spelling of 623016321 in words is "six hundred twenty-three million, sixteen thousand, three hundred twenty-one".