913788257 has 2 divisors, whose sum is σ = 913788258. Its totient is φ = 913788256.

The previous prime is 913788221. The next prime is 913788259. The reversal of 913788257 is 752887319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 852698401 + 61089856 = 29201^2 + 7816^2 .

It is a cyclic number.

It is not a de Polignac number, because 913788257 - 2⁶ = 913788193 is a prime.

Together with 913788259, 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 (913788259) 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, 456894128 + 456894129.

It is an arithmetic number, because the mean of its divisors is an integer number (456894129).

Almost surely, 2^913788257 is an apocalyptic number.

It is an amenable number.

913788257 is a deficient number, since it is larger than the sum of its proper divisors (1).

913788257 is an equidigital number, since it uses as much as digits as its factorization.

913788257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 50.

The square root of 913788257 is about 30228.9307948528. The cubic root of 913788257 is about 970.3949420905.

The spelling of 913788257 in words is "nine hundred thirteen million, seven hundred eighty-eight thousand, two hundred fifty-seven".