623038121 has 2 divisors, whose sum is σ = 623038122. Its totient is φ = 623038120.

The previous prime is 623038103. The next prime is 623038123. The reversal of 623038121 is 121830326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595360000 + 27678121 = 24400^2 + 5261^2 .

It is a cyclic number.

It is not a de Polignac number, because 623038121 - 2²² = 618843817 is a prime.

Together with 623038123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (623038123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311519060 + 311519061.

It is an arithmetic number, because the mean of its divisors is an integer number (311519061).

Almost surely, 2^623038121 is an apocalyptic number.

It is an amenable number.

623038121 is a deficient number, since it is larger than the sum of its proper divisors (1).

623038121 is an equidigital number, since it uses as much as digits as its factorization.

623038121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 623038121 is about 24960.7315798235. The cubic root of 623038121 is about 854.0924314063.

Adding to 623038121 its reverse (121830326), we get a palindrome (744868447).

The spelling of 623038121 in words is "six hundred twenty-three million, thirty-eight thousand, one hundred twenty-one".