788561 has 2 divisors, whose sum is σ = 788562. Its totient is φ = 788560.

The previous prime is 788549. The next prime is 788563. The reversal of 788561 is 165887.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 774400 + 14161 = 880^2 + 119^2 .

It is an emirp because it is prime and its reverse (165887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 788561 - 2⁶ = 788497 is a prime.

Together with 788563, 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 (788563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394280 + 394281.

It is an arithmetic number, because the mean of its divisors is an integer number (394281).

2⁷⁸⁸⁵⁶¹ is an apocalyptic number.

It is an amenable number.

788561 is a deficient number, since it is larger than the sum of its proper divisors (1).

788561 is an equidigital number, since it uses as much as digits as its factorization.

788561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 788561 is about 888.0095720205. The cubic root of 788561 is about 92.3871914306.

The spelling of 788561 in words is "seven hundred eighty-eight thousand, five hundred sixty-one".