781216411 has 2 divisors, whose sum is σ = 781216412. Its totient is φ = 781216410.

The previous prime is 781216393. The next prime is 781216417. The reversal of 781216411 is 114612187.

781216411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (114612187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 781216411 - 2⁵ = 781216379 is a prime.

It is a super-2 number, since 2×781216411² = 1220598161631441842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (781216417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390608205 + 390608206.

It is an arithmetic number, because the mean of its divisors is an integer number (390608206).

Almost surely, 2^781216411 is an apocalyptic number.

781216411 is a deficient number, since it is larger than the sum of its proper divisors (1).

781216411 is an equidigital number, since it uses as much as digits as its factorization.

781216411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

The square root of 781216411 is about 27950.2488539905. The cubic root of 781216411 is about 920.9946752246.

Adding to 781216411 its reverse (114612187), we get a palindrome (895828598).

The spelling of 781216411 in words is "seven hundred eighty-one million, two hundred sixteen thousand, four hundred eleven".