4168787257 has 2 divisors, whose sum is σ = 4168787258. Its totient is φ = 4168787256.

The previous prime is 4168787213. The next prime is 4168787267. The reversal of 4168787257 is 7527878614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2715347881 + 1453439376 = 52109^2 + 38124^2 .

It is a cyclic number.

It is not a de Polignac number, because 4168787257 - 2¹¹ = 4168785209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4168787198 and 4168787207.

It is not a weakly prime, because it can be changed into another prime (4168787267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2084393628 + 2084393629.

It is an arithmetic number, because the mean of its divisors is an integer number (2084393629).

Almost surely, 2^4168787257 is an apocalyptic number.

It is an amenable number.

4168787257 is a deficient number, since it is larger than the sum of its proper divisors (1).

4168787257 is an equidigital number, since it uses as much as digits as its factorization.

4168787257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5268480, while the sum is 55.

The square root of 4168787257 is about 64566.1463694404. The cubic root of 4168787257 is about 1609.4219157050.

The spelling of 4168787257 in words is "four billion, one hundred sixty-eight million, seven hundred eighty-seven thousand, two hundred fifty-seven".