7378438217 has 2 divisors, whose sum is σ = 7378438218. Its totient is φ = 7378438216.

The previous prime is 7378438211. The next prime is 7378438231. The reversal of 7378438217 is 7128348737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5234377801 + 2144060416 = 72349^2 + 46304^2 .

It is a cyclic number.

It is not a de Polignac number, because 7378438217 - 2⁶ = 7378438153 is a prime.

It is a super-2 number, since 2×7378438217² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7378438211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3689219108 + 3689219109.

It is an arithmetic number, because the mean of its divisors is an integer number (3689219109).

Almost surely, 2^7378438217 is an apocalyptic number.

It is an amenable number.

7378438217 is a deficient number, since it is larger than the sum of its proper divisors (1).

7378438217 is an equidigital number, since it uses as much as digits as its factorization.

7378438217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 50.

The square root of 7378438217 is about 85897.8359273387. The cubic root of 7378438217 is about 1946.8006460604.

The spelling of 7378438217 in words is "seven billion, three hundred seventy-eight million, four hundred thirty-eight thousand, two hundred seventeen".