382636981 has 2 divisors, whose sum is σ = 382636982. Its totient is φ = 382636980.

The previous prime is 382636951. The next prime is 382636987. The reversal of 382636981 is 189636283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371178756 + 11458225 = 19266^2 + 3385^2 .

It is a cyclic number.

It is not a de Polignac number, because 382636981 - 2⁵ = 382636949 is a prime.

It is a super-2 number, since 2×382636981² = 292822118457588722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (382636987) 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, 191318490 + 191318491.

It is an arithmetic number, because the mean of its divisors is an integer number (191318491).

Almost surely, 2^382636981 is an apocalyptic number.

It is an amenable number.

382636981 is a deficient number, since it is larger than the sum of its proper divisors (1).

382636981 is an equidigital number, since it uses as much as digits as its factorization.

382636981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 382636981 is about 19561.1088898355. The cubic root of 382636981 is about 725.9872280561.

The spelling of 382636981 in words is "three hundred eighty-two million, six hundred thirty-six thousand, nine hundred eighty-one".