623068421 has 4 divisors (see below), whose sum is σ = 623185644. Its totient is φ = 622951200.

The previous prime is 623068417. The next prime is 623068423. The reversal of 623068421 is 124860326.

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 199120321 + 423948100 = 14111^2 + 20590^2 .

It is a cyclic number.

It is not a de Polignac number, because 623068421 - 2² = 623068417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623068423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50240 + ... + 61401.

It is an arithmetic number, because the mean of its divisors is an integer number (155796411).

Almost surely, 2^623068421 is an apocalyptic number.

It is an amenable number.

623068421 is a deficient number, since it is larger than the sum of its proper divisors (117223).

623068421 is a wasteful number, since it uses less digits than its factorization.

623068421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117222.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 623068421 is about 24961.3385258083. The cubic root of 623068421 is about 854.1062767770.

The spelling of 623068421 in words is "six hundred twenty-three million, sixty-eight thousand, four hundred twenty-one".