7478869 has 2 divisors, whose sum is σ = 7478870. Its totient is φ = 7478868.

The previous prime is 7478831. The next prime is 7478873. The reversal of 7478869 is 9688747.

7478869 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4100625 + 3378244 = 2025^2 + 1838^2 .

It is an emirp because it is prime and its reverse (9688747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7478869 - 2⁹ = 7478357 is a prime.

It is a super-2 number, since 2×7478869² = 111866963038322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7478069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3739434 + 3739435.

It is an arithmetic number, because the mean of its divisors is an integer number (3739435).

Almost surely, 2^7478869 is an apocalyptic number.

It is an amenable number.

7478869 is a deficient number, since it is larger than the sum of its proper divisors (1).

7478869 is an equidigital number, since it uses as much as digits as its factorization.

7478869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 49.

The square root of 7478869 is about 2734.7520911410. The cubic root of 7478869 is about 195.5593756547.

The spelling of 7478869 in words is "seven million, four hundred seventy-eight thousand, eight hundred sixty-nine".