3820375721 has 8 divisors (see below), whose sum is σ = 3911270880. Its totient is φ = 3729573792.

The previous prime is 3820375717. The next prime is 3820375787. The reversal of 3820375721 is 1275730283.

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 3820375721 - 2² = 3820375717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3820375921) 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, 63410 + ... + 107988.

It is an arithmetic number, because the mean of its divisors is an integer number (488908860).

Almost surely, 2^3820375721 is an apocalyptic number.

It is an amenable number.

3820375721 is a deficient number, since it is larger than the sum of its proper divisors (90895159).

3820375721 is a wasteful number, since it uses less digits than its factorization.

3820375721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46615.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 3820375721 is about 61809.1879982256. The cubic root of 3820375721 is about 1563.2749140622.

The spelling of 3820375721 in words is "three billion, eight hundred twenty million, three hundred seventy-five thousand, seven hundred twenty-one".