3721843507 has 4 divisors (see below), whose sum is σ = 3940775496. Its totient is φ = 3502911520.

The previous prime is 3721843471. The next prime is 3721843529. The reversal of 3721843507 is 7053481273.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7053481273 = 37 ⋅190634629.

It is a cyclic number.

It is not a de Polignac number, because 3721843507 - 2¹⁹ = 3721319219 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 3721843507.

It is not an unprimeable number, because it can be changed into a prime (3721843547) 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, 109465969 + ... + 109466002.

It is an arithmetic number, because the mean of its divisors is an integer number (985193874).

Almost surely, 2^3721843507 is an apocalyptic number.

3721843507 is a deficient number, since it is larger than the sum of its proper divisors (218931989).

3721843507 is a wasteful number, since it uses less digits than its factorization.

3721843507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218931988.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 3721843507 is about 61006.9136000175. The cubic root of 3721843507 is about 1549.7180905270.

The spelling of 3721843507 in words is "three billion, seven hundred twenty-one million, eight hundred forty-three thousand, five hundred seven".