7118857 has 2 divisors, whose sum is σ = 7118858. Its totient is φ = 7118856.

The previous prime is 7118807. The next prime is 7118861. The reversal of 7118857 is 7588117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5900041 + 1218816 = 2429^2 + 1104^2 .

It is an emirp because it is prime and its reverse (7588117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7118857 - 2¹⁵ = 7086089 is a prime.

It is not a weakly prime, because it can be changed into another prime (7118807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3559428 + 3559429.

It is an arithmetic number, because the mean of its divisors is an integer number (3559429).

Almost surely, 2^7118857 is an apocalyptic number.

It is an amenable number.

7118857 is a deficient number, since it is larger than the sum of its proper divisors (1).

7118857 is an equidigital number, since it uses as much as digits as its factorization.

7118857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 37.

The square root of 7118857 is about 2668.1186255487. The cubic root of 7118857 is about 192.3697392772.

The spelling of 7118857 in words is "seven million, one hundred eighteen thousand, eight hundred fifty-seven".