623362021 has 2 divisors, whose sum is σ = 623362022. Its totient is φ = 623362020.

The previous prime is 623362007. The next prime is 623362027. The reversal of 623362021 is 120263326.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496799521 + 126562500 = 22289^2 + 11250^2 .

It is a cyclic number.

It is not a de Polignac number, because 623362021 - 2¹¹ = 623359973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623362027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311681010 + 311681011.

It is an arithmetic number, because the mean of its divisors is an integer number (311681011).

Almost surely, 2^623362021 is an apocalyptic number.

It is an amenable number.

623362021 is a deficient number, since it is larger than the sum of its proper divisors (1).

623362021 is an equidigital number, since it uses as much as digits as its factorization.

623362021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 623362021 is about 24967.2189280264. The cubic root of 623362021 is about 854.2404119786.

The spelling of 623362021 in words is "six hundred twenty-three million, three hundred sixty-two thousand, twenty-one".