791140687 has 2 divisors, whose sum is σ = 791140688. Its totient is φ = 791140686.

The previous prime is 791140673. The next prime is 791140711. The reversal of 791140687 is 786041197.

It is a weak prime.

It is an emirp because it is prime and its reverse (786041197) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791140687 is a prime.

It is a super-3 number, since 3×791140687³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791140657) 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, 395570343 + 395570344.

It is an arithmetic number, because the mean of its divisors is an integer number (395570344).

Almost surely, 2^791140687 is an apocalyptic number.

791140687 is a deficient number, since it is larger than the sum of its proper divisors (1).

791140687 is an equidigital number, since it uses as much as digits as its factorization.

791140687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 791140687 is about 28127.2232365728. The cubic root of 791140687 is about 924.8782647686.

The spelling of 791140687 in words is "seven hundred ninety-one million, one hundred forty thousand, six hundred eighty-seven".