784111997 has 2 divisors, whose sum is σ = 784111998. Its totient is φ = 784111996.

The previous prime is 784111967. The next prime is 784112027. The reversal of 784111997 is 799111487.

It is a balanced prime because it is at equal distance from previous prime (784111967) and next prime (784112027).

It can be written as a sum of positive squares in only one way, i.e., 537590596 + 246521401 = 23186^2 + 15701^2 .

It is an emirp because it is prime and its reverse (799111487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 784111997 - 2¹⁸ = 783849853 is a prime.

It is a super-2 number, since 2×784111997² = 1229663247678656018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (784111957) 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, 392055998 + 392055999.

It is an arithmetic number, because the mean of its divisors is an integer number (392055999).

Almost surely, 2^784111997 is an apocalyptic number.

It is an amenable number.

784111997 is a deficient number, since it is larger than the sum of its proper divisors (1).

784111997 is an equidigital number, since it uses as much as digits as its factorization.

784111997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 47.

The square root of 784111997 is about 28001.9998750089. Note that the first 3 decimals coincide. The cubic root of 784111997 is about 922.1311640620.

It can be divided in two parts, 78411 and 1997, that added together give a palindrome (80408).

The spelling of 784111997 in words is "seven hundred eighty-four million, one hundred eleven thousand, nine hundred ninety-seven".