3721000001 has 8 divisors (see below), whose sum is σ = 3954110760. Its totient is φ = 3489470208.

The previous prime is 3720999949. The next prime is 3721000037. The reversal of 3721000001 is 1000001273.

It is a Cunningham number, because it is equal to 61000²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 641304976 + 3079695025 = 25324^2 + 55495^2 .

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 3721000001 - 2⁶ = 3720999937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3721000001.

It is not an unprimeable number, because it can be changed into a prime (3721000301) 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 7 ways as a sum of consecutive naturals, for example, 390386 + ... + 399803.

It is an arithmetic number, because the mean of its divisors is an integer number (494263845).

Almost surely, 2^3721000001 is an apocalyptic number.

It is an amenable number.

3721000001 is a deficient number, since it is larger than the sum of its proper divisors (233110759).

3721000001 is a wasteful number, since it uses less digits than its factorization.

3721000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790483.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 3721000001 is about 61000.0000081967. Note that the first 5 decimals coincide. The cubic root of 3721000001 is about 1549.6010073960.

Adding to 3721000001 its reverse (1000001273), we get a palindrome (4721001274).

The spelling of 3721000001 in words is "three billion, seven hundred twenty-one million, one", and thus it is an aban number.