621411403 has 4 divisors (see below), whose sum is σ = 623774448. Its totient is φ = 619048360.

The previous prime is 621411377. The next prime is 621411407. The reversal of 621411403 is 304114126.

621411403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 621411403 - 2⁹ = 621410891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621411407) 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, 1181128 + ... + 1181653.

It is an arithmetic number, because the mean of its divisors is an integer number (155943612).

Almost surely, 2^621411403 is an apocalyptic number.

621411403 is a deficient number, since it is larger than the sum of its proper divisors (2363045).

621411403 is a wasteful number, since it uses less digits than its factorization.

621411403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363044.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 621411403 is about 24928.1247389369. The cubic root of 621411403 is about 853.3484542032.

Adding to 621411403 its reverse (304114126), we get a palindrome (925525529).

The spelling of 621411403 in words is "six hundred twenty-one million, four hundred eleven thousand, four hundred three".