621471623 has 2 divisors, whose sum is σ = 621471624. Its totient is φ = 621471622.

The previous prime is 621471607. The next prime is 621471649. The reversal of 621471623 is 326174126.

621471623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621471623 - 2⁴ = 621471607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621471623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621471223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310735811 + 310735812.

It is an arithmetic number, because the mean of its divisors is an integer number (310735812).

Almost surely, 2^621471623 is an apocalyptic number.

621471623 is a deficient number, since it is larger than the sum of its proper divisors (1).

621471623 is an equidigital number, since it uses as much as digits as its factorization.

621471623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 621471623 is about 24929.3325823216. The cubic root of 621471623 is about 853.3760188642.

The spelling of 621471623 in words is "six hundred twenty-one million, four hundred seventy-one thousand, six hundred twenty-three".