1912715257 has 2 divisors, whose sum is σ = 1912715258. Its totient is φ = 1912715256.

The previous prime is 1912715249. The next prime is 1912715261. The reversal of 1912715257 is 7525172191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1173473536 + 739241721 = 34256^2 + 27189^2 .

It is an emirp because it is prime and its reverse (7525172191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1912715257 - 2³ = 1912715249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1912715657) 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, 956357628 + 956357629.

It is an arithmetic number, because the mean of its divisors is an integer number (956357629).

Almost surely, 2^1912715257 is an apocalyptic number.

It is an amenable number.

1912715257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912715257 is an equidigital number, since it uses as much as digits as its factorization.

1912715257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44100, while the sum is 40.

The square root of 1912715257 is about 43734.6002268227. The cubic root of 1912715257 is about 1241.3191080760.

The spelling of 1912715257 in words is "one billion, nine hundred twelve million, seven hundred fifteen thousand, two hundred fifty-seven".