840788699 has 2 divisors, whose sum is σ = 840788700. Its totient is φ = 840788698.

The previous prime is 840788671. The next prime is 840788701. The reversal of 840788699 is 996887048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 840788699 - 2²⁴ = 824011483 is a prime.

It is a super-2 number, since 2×840788699² = 1413851272732225202, which contains 22 as substring.

Together with 840788701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (840788609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420394349 + 420394350.

It is an arithmetic number, because the mean of its divisors is an integer number (420394350).

Almost surely, 2^840788699 is an apocalyptic number.

840788699 is a deficient number, since it is larger than the sum of its proper divisors (1).

840788699 is an equidigital number, since it uses as much as digits as its factorization.

840788699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The square root of 840788699 is about 28996.3566504483. The cubic root of 840788699 is about 943.8340084918.

The spelling of 840788699 in words is "eight hundred forty million, seven hundred eighty-eight thousand, six hundred ninety-nine".