4406812381 has 2 divisors, whose sum is σ = 4406812382. Its totient is φ = 4406812380.

The previous prime is 4406812337. The next prime is 4406812391. The reversal of 4406812381 is 1832186044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3127605625 + 1279206756 = 55925^2 + 35766^2 .

It is a cyclic number.

It is not a de Polignac number, because 4406812381 - 2⁹ = 4406811869 is a prime.

It is a super-2 number, since 2×4406812381² = 38839990722669778322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4406812381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4406812331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2203406190 + 2203406191.

It is an arithmetic number, because the mean of its divisors is an integer number (2203406191).

Almost surely, 2^4406812381 is an apocalyptic number.

It is an amenable number.

4406812381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4406812381 is an equidigital number, since it uses as much as digits as its factorization.

4406812381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 4406812381 is about 66383.8262003630. The cubic root of 4406812381 is about 1639.4877912867.

The spelling of 4406812381 in words is "four billion, four hundred six million, eight hundred twelve thousand, three hundred eighty-one".