3904221901 has 8 divisors (see below), whose sum is σ = 3944420480. Its totient is φ = 3864067632.

The previous prime is 3904221863. The next prime is 3904221943. The reversal of 3904221901 is 1091224093.

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 3904221901 - 2¹¹ = 3904219853 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 (3904221401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183451 + ... + 203623.

It is an arithmetic number, because the mean of its divisors is an integer number (493052560).

Almost surely, 2^3904221901 is an apocalyptic number.

It is an amenable number.

3904221901 is a deficient number, since it is larger than the sum of its proper divisors (40198579).

3904221901 is a wasteful number, since it uses less digits than its factorization.

3904221901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22155.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 3904221901 is about 62483.7731015021. The cubic root of 3904221901 is about 1574.6287057584.

Adding to 3904221901 its reverse (1091224093), we get a palindrome (4995445994).

The spelling of 3904221901 in words is "three billion, nine hundred four million, two hundred twenty-one thousand, nine hundred one".