621473359 has 4 divisors (see below), whose sum is σ = 669279016. Its totient is φ = 573667704.

The previous prime is 621473351. The next prime is 621473371. The reversal of 621473359 is 953374126.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953374126 = 2 ⋅476687063.

It is a cyclic number.

It is not a de Polignac number, because 621473359 - 2³ = 621473351 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 (621473351) 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, 23902809 + ... + 23902834.

It is an arithmetic number, because the mean of its divisors is an integer number (167319754).

Almost surely, 2^621473359 is an apocalyptic number.

621473359 is a deficient number, since it is larger than the sum of its proper divisors (47805657).

621473359 is a wasteful number, since it uses less digits than its factorization.

621473359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47805656.

The product of its digits is 136080, while the sum is 40.

The square root of 621473359 is about 24929.3674007184. The cubic root of 621473359 is about 853.3768134617.

The spelling of 621473359 in words is "six hundred twenty-one million, four hundred seventy-three thousand, three hundred fifty-nine".