3721352861 has 4 divisors (see below), whose sum is σ = 3721476000. Its totient is φ = 3721229724.

The previous prime is 3721352849. The next prime is 3721352881. The reversal of 3721352861 is 1682531273.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3721352861 - 2¹⁴ = 3721336477 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 (3721352801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18290 + ... + 88188.

It is an arithmetic number, because the mean of its divisors is an integer number (930369000).

Almost surely, 2^3721352861 is an apocalyptic number.

It is an amenable number.

3721352861 is a deficient number, since it is larger than the sum of its proper divisors (123139).

3721352861 is an equidigital number, since it uses as much as digits as its factorization.

3721352861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123138.

The product of its digits is 60480, while the sum is 38.

The square root of 3721352861 is about 61002.8922347129. The cubic root of 3721352861 is about 1549.6499883982.

The spelling of 3721352861 in words is "three billion, seven hundred twenty-one million, three hundred fifty-two thousand, eight hundred sixty-one".