621493329 has 16 divisors (see below), whose sum is σ = 852875648. Its totient is φ = 402268032.

The previous prime is 621493307. The next prime is 621493349. The reversal of 621493329 is 923394126.

It is not a de Polignac number, because 621493329 - 2⁵ = 621493297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621493349) 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, 48309 + ... + 59805.

It is an arithmetic number, because the mean of its divisors is an integer number (53304728).

Almost surely, 2^621493329 is an apocalyptic number.

It is an amenable number.

621493329 is a deficient number, since it is larger than the sum of its proper divisors (231382319).

621493329 is a wasteful number, since it uses less digits than its factorization.

621493329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12024.

The product of its digits is 69984, while the sum is 39.

The square root of 621493329 is about 24929.7679291244. The cubic root of 621493329 is about 853.3859539728.

The spelling of 621493329 in words is "six hundred twenty-one million, four hundred ninety-three thousand, three hundred twenty-nine".