621478363 has 16 divisors (see below), whose sum is σ = 686517120. Its totient is φ = 557899200.

The previous prime is 621478339. The next prime is 621478373. The reversal of 621478363 is 363874126.

It is a cyclic number.

It is not a de Polignac number, because 621478363 - 2²¹ = 619381211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621478373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480748 + ... + 482038.

It is an arithmetic number, because the mean of its divisors is an integer number (42907320).

Almost surely, 2^621478363 is an apocalyptic number.

621478363 is a deficient number, since it is larger than the sum of its proper divisors (65038757).

621478363 is a wasteful number, since it uses less digits than its factorization.

621478363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818.

The product of its digits is 145152, while the sum is 40.

The square root of 621478363 is about 24929.4677640739. The cubic root of 621478363 is about 853.3791038716.

The spelling of 621478363 in words is "six hundred twenty-one million, four hundred seventy-eight thousand, three hundred sixty-three".