782041457 has 2 divisors, whose sum is σ = 782041458. Its totient is φ = 782041456.

The previous prime is 782041441. The next prime is 782041517. The reversal of 782041457 is 754140287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435932641 + 346108816 = 20879^2 + 18604^2 .

It is an emirp because it is prime and its reverse (754140287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 782041457 - 2⁴ = 782041441 is a prime.

It is a super-2 number, since 2×782041457² = 1223177680933365698, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 782041457.

It is not a weakly prime, because it can be changed into another prime (782041417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391020728 + 391020729.

It is an arithmetic number, because the mean of its divisors is an integer number (391020729).

Almost surely, 2^782041457 is an apocalyptic number.

It is an amenable number.

782041457 is a deficient number, since it is larger than the sum of its proper divisors (1).

782041457 is an equidigital number, since it uses as much as digits as its factorization.

782041457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 782041457 is about 27965.0041480419. The cubic root of 782041457 is about 921.3187832954.

The spelling of 782041457 in words is "seven hundred eighty-two million, forty-one thousand, four hundred fifty-seven".