3738291221 has 4 divisors (see below), whose sum is σ = 4272332832. Its totient is φ = 3204249612.

The previous prime is 3738291191. The next prime is 3738291229. The reversal of 3738291221 is 1221928373.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3738291221 - 2²⁶ = 3671182357 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 (3738291229) 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, 267020795 + ... + 267020808.

It is an arithmetic number, because the mean of its divisors is an integer number (1068083208).

Almost surely, 2^3738291221 is an apocalyptic number.

It is an amenable number.

3738291221 is a deficient number, since it is larger than the sum of its proper divisors (534041611).

3738291221 is an equidigital number, since it uses as much as digits as its factorization.

3738291221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534041610.

The product of its digits is 36288, while the sum is 38.

The square root of 3738291221 is about 61141.5670473042. The cubic root of 3738291221 is about 1551.9975938614.

The spelling of 3738291221 in words is "three billion, seven hundred thirty-eight million, two hundred ninety-one thousand, two hundred twenty-one".