7478813 has 2 divisors, whose sum is σ = 7478814. Its totient is φ = 7478812.

The previous prime is 7478791. The next prime is 7478831. The reversal of 7478813 is 3188747.

Together with next prime (7478831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6340324 + 1138489 = 2518^2 + 1067^2 .

It is a cyclic number.

It is not a de Polignac number, because 7478813 - 2¹² = 7474717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7478873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3739406 + 3739407.

It is an arithmetic number, because the mean of its divisors is an integer number (3739407).

Almost surely, 2^7478813 is an apocalyptic number.

It is an amenable number.

7478813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7478813 is an equidigital number, since it uses as much as digits as its factorization.

7478813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The square root of 7478813 is about 2734.7418525338. The cubic root of 7478813 is about 195.5588875528.

It can be divided in two parts, 74 and 78813, that added together give a palindrome (78887).

The spelling of 7478813 in words is "seven million, four hundred seventy-eight thousand, eight hundred thirteen".