782134891 has 2 divisors, whose sum is σ = 782134892. Its totient is φ = 782134890.

The previous prime is 782134889. The next prime is 782134931. The reversal of 782134891 is 198431287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 782134891 - 2¹ = 782134889 is a prime.

It is a super-2 number, since 2×782134891² = 1223469975439163762, which contains 22 as substring.

Together with 782134889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (782134831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391067445 + 391067446.

It is an arithmetic number, because the mean of its divisors is an integer number (391067446).

Almost surely, 2^782134891 is an apocalyptic number.

782134891 is a deficient number, since it is larger than the sum of its proper divisors (1).

782134891 is an equidigital number, since it uses as much as digits as its factorization.

782134891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 782134891 is about 27966.6746503763. The cubic root of 782134891 is about 921.3554731965.

The spelling of 782134891 in words is "seven hundred eighty-two million, one hundred thirty-four thousand, eight hundred ninety-one".