621364447 has 16 divisors (see below), whose sum is σ = 689264640. Its totient is φ = 555438400.

The previous prime is 621364427. The next prime is 621364463. The reversal of 621364447 is 744463126.

It is not a de Polignac number, because 621364447 - 2¹⁵ = 621331679 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 (621364417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185328 + ... + 188650.

It is an arithmetic number, because the mean of its divisors is an integer number (43079040).

Almost surely, 2^621364447 is an apocalyptic number.

621364447 is a deficient number, since it is larger than the sum of its proper divisors (67900193).

621364447 is a wasteful number, since it uses less digits than its factorization.

621364447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614.

The product of its digits is 96768, while the sum is 37.

The square root of 621364447 is about 24927.1828933797. The cubic root of 621364447 is about 853.3269596726.

The spelling of 621364447 in words is "six hundred twenty-one million, three hundred sixty-four thousand, four hundred forty-seven".