3721381983 has 36 divisors (see below), whose sum is σ = 5916914640. Its totient is φ = 2252141760.

The previous prime is 3721381849. The next prime is 3721381987. The reversal of 3721381983 is 3891831273.

It is a happy number.

It is not a de Polignac number, because 3721381983 - 2¹⁰ = 3721380959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721381987) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 911635 + ... + 915707.

It is an arithmetic number, because the mean of its divisors is an integer number (164358740).

Almost surely, 2^3721381983 is an apocalyptic number.

3721381983 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3721381983 is a deficient number, since it is larger than the sum of its proper divisors (2195532657).

3721381983 is a wasteful number, since it uses less digits than its factorization.

3721381983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4940 (or 4926 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 3721381983 is about 61003.1309278466. The cubic root of 3721381983 is about 1549.6540307264.

The spelling of 3721381983 in words is "three billion, seven hundred twenty-one million, three hundred eighty-one thousand, nine hundred eighty-three".