3721228829 has 4 divisors (see below), whose sum is σ = 3722755740. Its totient is φ = 3719701920.

The previous prime is 3721228813. The next prime is 3721228853. The reversal of 3721228829 is 9288221273.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1049889604 + 2671339225 = 32402^2 + 51685^2 .

It is a cyclic number.

It is not a de Polignac number, because 3721228829 - 2⁴ = 3721228813 is a prime.

It is a super-2 number, since 2×3721228829² = 27695087995561422482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3721228829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721228859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759794 + ... + 764675.

It is an arithmetic number, because the mean of its divisors is an integer number (930688935).

Almost surely, 2^3721228829 is an apocalyptic number.

It is an amenable number.

3721228829 is a deficient number, since it is larger than the sum of its proper divisors (1526911).

3721228829 is a wasteful number, since it uses less digits than its factorization.

3721228829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526910.

The product of its digits is 193536, while the sum is 44.

The square root of 3721228829 is about 61001.8756187054. The cubic root of 3721228829 is about 1549.6327716915.

The spelling of 3721228829 in words is "three billion, seven hundred twenty-one million, two hundred twenty-eight thousand, eight hundred twenty-nine".