621612103 has 4 divisors (see below), whose sum is σ = 710413840. Its totient is φ = 532810368.

The previous prime is 621612091. The next prime is 621612109. The reversal of 621612103 is 301216126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621612103 - 2⁹ = 621611591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621612109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44400858 + ... + 44400871.

It is an arithmetic number, because the mean of its divisors is an integer number (177603460).

Almost surely, 2^621612103 is an apocalyptic number.

621612103 is a deficient number, since it is larger than the sum of its proper divisors (88801737).

621612103 is an equidigital number, since it uses as much as digits as its factorization.

621612103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88801736.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 621612103 is about 24932.1499875161. The cubic root of 621612103 is about 853.4403142275.

Adding to 621612103 its reverse (301216126), we get a palindrome (922828229).

The spelling of 621612103 in words is "six hundred twenty-one million, six hundred twelve thousand, one hundred three".