621612303 has 32 divisors (see below), whose sum is σ = 971980800. Its totient is φ = 349888896.

The previous prime is 621612287. The next prime is 621612307. The reversal of 621612303 is 303216126.

It is a happy number.

It is not a de Polignac number, because 621612303 - 2⁴ = 621612287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621612307) 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 in 31 ways as a sum of consecutive naturals, for example, 7026 + ... + 35952.

It is an arithmetic number, because the mean of its divisors is an integer number (30374400).

Almost surely, 2^621612303 is an apocalyptic number.

621612303 is a deficient number, since it is larger than the sum of its proper divisors (350368497).

621612303 is a wasteful number, since it uses less digits than its factorization.

621612303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28991.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 621612303 is about 24932.1539984013. The cubic root of 621612303 is about 853.4404057573.

Adding to 621612303 its reverse (303216126), we get a palindrome (924828429).

The spelling of 621612303 in words is "six hundred twenty-one million, six hundred twelve thousand, three hundred three".