7427869 has 2 divisors, whose sum is σ = 7427870. Its totient is φ = 7427868.

The previous prime is 7427867. The next prime is 7427887. The reversal of 7427869 is 9687247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7371225 + 56644 = 2715^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 7427869 - 2¹ = 7427867 is a prime.

It is a super-2 number, since 2×7427869² = 110346475762322, which contains 22 as substring.

Together with 7427867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7427867) 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, 3713934 + 3713935.

It is an arithmetic number, because the mean of its divisors is an integer number (3713935).

Almost surely, 2^7427869 is an apocalyptic number.

It is an amenable number.

7427869 is a deficient number, since it is larger than the sum of its proper divisors (1).

7427869 is an equidigital number, since it uses as much as digits as its factorization.

7427869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 7427869 is about 2725.4117120171. The cubic root of 7427869 is about 195.1138410436.

It can be divided in two parts, 74278 and 69, that added together give a palindrome (74347).

The spelling of 7427869 in words is "seven million, four hundred twenty-seven thousand, eight hundred sixty-nine".