623212123 has 2 divisors, whose sum is σ = 623212124. Its totient is φ = 623212122.

The previous prime is 623212049. The next prime is 623212147. The reversal of 623212123 is 321212326.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623212123 - 2²¹ = 621114971 is a prime.

It is a super-3 number, since 3×623212123³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 623212094 and 623212103.

It is not a weakly prime, because it can be changed into another prime (623212823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311606061 + 311606062.

It is an arithmetic number, because the mean of its divisors is an integer number (311606062).

Almost surely, 2^623212123 is an apocalyptic number.

623212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

623212123 is an equidigital number, since it uses as much as digits as its factorization.

623212123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 623212123 is about 24964.2168513254. The cubic root of 623212123 is about 854.1719342775.

Adding to 623212123 its reverse (321212326), we get a palindrome (944424449).

The spelling of 623212123 in words is "six hundred twenty-three million, two hundred twelve thousand, one hundred twenty-three".