782056381 has 2 divisors, whose sum is σ = 782056382. Its totient is φ = 782056380.

The previous prime is 782056367. The next prime is 782056403. The reversal of 782056381 is 183650287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 559748281 + 222308100 = 23659^2 + 14910^2 .

It is an emirp because it is prime and its reverse (183650287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 782056381 - 2²⁹ = 245185469 is a prime.

It is a super-2 number, since 2×782056381² = 1223224366125634322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (782056981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391028190 + 391028191.

It is an arithmetic number, because the mean of its divisors is an integer number (391028191).

Almost surely, 2^782056381 is an apocalyptic number.

It is an amenable number.

782056381 is a deficient number, since it is larger than the sum of its proper divisors (1).

782056381 is an equidigital number, since it uses as much as digits as its factorization.

782056381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 782056381 is about 27965.2709802712. The cubic root of 782056381 is about 921.3246438858.

The spelling of 782056381 in words is "seven hundred eighty-two million, fifty-six thousand, three hundred eighty-one".