3953725381 has 4 divisors (see below), whose sum is σ = 3957266092. Its totient is φ = 3950184672.

The previous prime is 3953725379. The next prime is 3953725387. The reversal of 3953725381 is 1835273593.

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 1194324481 + 2759400900 = 34559^2 + 52530^2 .

It is a cyclic number.

It is not a de Polignac number, because 3953725381 - 2¹ = 3953725379 is a prime.

It is a super-3 number, since 3×3953725381³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3953725387) 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, 1768680 + ... + 1770913.

It is an arithmetic number, because the mean of its divisors is an integer number (989316523).

Almost surely, 2^3953725381 is an apocalyptic number.

It is an amenable number.

3953725381 is a deficient number, since it is larger than the sum of its proper divisors (3540711).

3953725381 is a wasteful number, since it uses less digits than its factorization.

3953725381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540710.

The product of its digits is 680400, while the sum is 46.

The square root of 3953725381 is about 62878.6560050388. The cubic root of 3953725381 is about 1581.2559288503.

The spelling of 3953725381 in words is "three billion, nine hundred fifty-three million, seven hundred twenty-five thousand, three hundred eighty-one".