3688906421 has 8 divisors (see below), whose sum is σ = 3724008288. Its totient is φ = 3653910000.

The previous prime is 3688906393. The next prime is 3688906453. The reversal of 3688906421 is 1246098863.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3688906421 - 2¹⁰ = 3688905397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3688906021) 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 7 ways as a sum of consecutive naturals, for example, 44846 + ... + 96896.

It is an arithmetic number, because the mean of its divisors is an integer number (465501036).

Almost surely, 2^3688906421 is an apocalyptic number.

It is an amenable number.

3688906421 is a deficient number, since it is larger than the sum of its proper divisors (35101867).

3688906421 is a wasteful number, since it uses less digits than its factorization.

3688906421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52723.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 3688906421 is about 60736.3681907307. The cubic root of 3688906421 is about 1545.1330406341.

The spelling of 3688906421 in words is "three billion, six hundred eighty-eight million, nine hundred six thousand, four hundred twenty-one".