3621685829 has 2 divisors, whose sum is σ = 3621685830. Its totient is φ = 3621685828.

The previous prime is 3621685813. The next prime is 3621685877. The reversal of 3621685829 is 9285861263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2797881025 + 823804804 = 52895^2 + 28702^2 .

It is a cyclic number.

It is not a de Polignac number, because 3621685829 - 2⁴ = 3621685813 is a prime.

It is a super-3 number, since 3×3621685829³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3621685889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810842914 + 1810842915.

It is an arithmetic number, because the mean of its divisors is an integer number (1810842915).

Almost surely, 2^3621685829 is an apocalyptic number.

It is an amenable number.

3621685829 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621685829 is an equidigital number, since it uses as much as digits as its factorization.

3621685829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 50.

The square root of 3621685829 is about 60180.4439082996. The cubic root of 3621685829 is about 1535.6901237423.

The spelling of 3621685829 in words is "three billion, six hundred twenty-one million, six hundred eighty-five thousand, eight hundred twenty-nine".