623221237 has 2 divisors, whose sum is σ = 623221238. Its totient is φ = 623221236.

The previous prime is 623221219. The next prime is 623221253. The reversal of 623221237 is 732122326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 454585041 + 168636196 = 21321^2 + 12986^2 .

It is a cyclic number.

It is not a de Polignac number, because 623221237 - 2¹¹ = 623219189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623221537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311610618 + 311610619.

It is an arithmetic number, because the mean of its divisors is an integer number (311610619).

Almost surely, 2^623221237 is an apocalyptic number.

It is an amenable number.

623221237 is a deficient number, since it is larger than the sum of its proper divisors (1).

623221237 is an equidigital number, since it uses as much as digits as its factorization.

623221237 is an evil number, because the sum of its binary digits is even.

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

The square root of 623221237 is about 24964.3993919341. The cubic root of 623221237 is about 854.1760981273.

The spelling of 623221237 in words is "six hundred twenty-three million, two hundred twenty-one thousand, two hundred thirty-seven".