621297203 has 2 divisors, whose sum is σ = 621297204. Its totient is φ = 621297202.

The previous prime is 621297179. The next prime is 621297223. The reversal of 621297203 is 302792126.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621297203 - 2¹² = 621293107 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621297203.

It is not a weakly prime, because it can be changed into another prime (621297223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310648601 + 310648602.

It is an arithmetic number, because the mean of its divisors is an integer number (310648602).

Almost surely, 2^621297203 is an apocalyptic number.

621297203 is a deficient number, since it is larger than the sum of its proper divisors (1).

621297203 is an equidigital number, since it uses as much as digits as its factorization.

621297203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 621297203 is about 24925.8340482320. The cubic root of 621297203 is about 853.2961762419.

The spelling of 621297203 in words is "six hundred twenty-one million, two hundred ninety-seven thousand, two hundred three".