3438641621 has 4 divisors (see below), whose sum is σ = 3557215500. Its totient is φ = 3320067744.

The previous prime is 3438641617. The next prime is 3438641671. The reversal of 3438641621 is 1261468343.

It is a happy number.

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 580135396 + 2858506225 = 24086^2 + 53465^2 .

It is a cyclic number.

It is not a de Polignac number, because 3438641621 - 2² = 3438641617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3438641671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59286896 + ... + 59286953.

It is an arithmetic number, because the mean of its divisors is an integer number (889303875).

Almost surely, 2^3438641621 is an apocalyptic number.

It is an amenable number.

3438641621 is a deficient number, since it is larger than the sum of its proper divisors (118573879).

3438641621 is a wasteful number, since it uses less digits than its factorization.

3438641621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118573878.

The product of its digits is 82944, while the sum is 38.

The square root of 3438641621 is about 58639.9319661952. The cubic root of 3438641621 is about 1509.3697384325.

The spelling of 3438641621 in words is "three billion, four hundred thirty-eight million, six hundred forty-one thousand, six hundred twenty-one".