621229829 has 16 divisors (see below), whose sum is σ = 691768896. Its totient is φ = 553132800.

The previous prime is 621229823. The next prime is 621229841. The reversal of 621229829 is 928922126.

It is not a de Polignac number, because 621229829 - 2²⁰ = 620181253 is a prime.

It is a super-3 number, since 3×621229829³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621229823) 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, 131069 + ... + 135725.

It is an arithmetic number, because the mean of its divisors is an integer number (43235556).

Almost surely, 2^621229829 is an apocalyptic number.

It is an amenable number.

621229829 is a deficient number, since it is larger than the sum of its proper divisors (70539067).

621229829 is a wasteful number, since it uses less digits than its factorization.

621229829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916.

The product of its digits is 62208, while the sum is 41.

The square root of 621229829 is about 24924.4825222110. The cubic root of 621229829 is about 853.2653310712.

The spelling of 621229829 in words is "six hundred twenty-one million, two hundred twenty-nine thousand, eight hundred twenty-nine".