3726749381 has 4 divisors (see below), whose sum is σ = 3727006764. Its totient is φ = 3726492000.

The previous prime is 3726749339. The next prime is 3726749419. The reversal of 3726749381 is 1839476273.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3688618756 + 38130625 = 60734^2 + 6175^2 .

It is a cyclic number.

It is not a de Polignac number, because 3726749381 - 2¹⁰ = 3726748357 is a prime.

It is a super-2 number, since 2×3726749381² = 27777321897567766322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3726749321) 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 3 ways as a sum of consecutive naturals, for example, 105590 + ... + 136391.

It is an arithmetic number, because the mean of its divisors is an integer number (931751691).

Almost surely, 2^3726749381 is an apocalyptic number.

It is an amenable number.

3726749381 is a deficient number, since it is larger than the sum of its proper divisors (257383).

3726749381 is a wasteful number, since it uses less digits than its factorization.

3726749381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257382.

The product of its digits is 1524096, while the sum is 50.

The square root of 3726749381 is about 61047.1078839940. The cubic root of 3726749381 is about 1550.3987015968.

The spelling of 3726749381 in words is "three billion, seven hundred twenty-six million, seven hundred forty-nine thousand, three hundred eighty-one".