7128697 has 2 divisors, whose sum is σ = 7128698. Its totient is φ = 7128696.

The previous prime is 7128691. The next prime is 7128701. The reversal of 7128697 is 7968217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6170256 + 958441 = 2484^2 + 979^2 .

It is an emirp because it is prime and its reverse (7968217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7128697 - 2¹¹ = 7126649 is a prime.

It is not a weakly prime, because it can be changed into another prime (7128691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3564348 + 3564349.

It is an arithmetic number, because the mean of its divisors is an integer number (3564349).

Almost surely, 2^7128697 is an apocalyptic number.

It is an amenable number.

7128697 is a deficient number, since it is larger than the sum of its proper divisors (1).

7128697 is an equidigital number, since it uses as much as digits as its factorization.

7128697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 7128697 is about 2669.9619847481. The cubic root of 7128697 is about 192.4583324669.

It can be divided in two parts, 712 and 8697, that added together give a square (9409 = 97²).

The spelling of 7128697 in words is "seven million, one hundred twenty-eight thousand, six hundred ninety-seven".