382531813 has 2 divisors, whose sum is σ = 382531814. Its totient is φ = 382531812.

The previous prime is 382531801. The next prime is 382531843. The reversal of 382531813 is 318135283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334963204 + 47568609 = 18302^2 + 6897^2 .

It is an emirp because it is prime and its reverse (318135283) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 382531813 - 2¹³ = 382523621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (382531843) 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 as a sum of consecutive naturals, namely, 191265906 + 191265907.

It is an arithmetic number, because the mean of its divisors is an integer number (191265907).

Almost surely, 2^382531813 is an apocalyptic number.

It is an amenable number.

382531813 is a deficient number, since it is larger than the sum of its proper divisors (1).

382531813 is an equidigital number, since it uses as much as digits as its factorization.

382531813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 382531813 is about 19558.4205139372. The cubic root of 382531813 is about 725.9207092888.

The spelling of 382531813 in words is "three hundred eighty-two million, five hundred thirty-one thousand, eight hundred thirteen".