382776421 has 2 divisors, whose sum is σ = 382776422. Its totient is φ = 382776420.

The previous prime is 382776397. The next prime is 382776431. The reversal of 382776421 is 124677283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310288225 + 72488196 = 17615^2 + 8514^2 .

It is a cyclic number.

It is not a de Polignac number, because 382776421 - 2¹⁷ = 382645349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (382776431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191388210 + 191388211.

It is an arithmetic number, because the mean of its divisors is an integer number (191388211).

Almost surely, 2^382776421 is an apocalyptic number.

It is an amenable number.

382776421 is a deficient number, since it is larger than the sum of its proper divisors (1).

382776421 is an equidigital number, since it uses as much as digits as its factorization.

382776421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 40.

The square root of 382776421 is about 19564.6727802946. The cubic root of 382776421 is about 726.0754050748.

The spelling of 382776421 in words is "three hundred eighty-two million, seven hundred seventy-six thousand, four hundred twenty-one".