45378197 has 2 divisors, whose sum is σ = 45378198. Its totient is φ = 45378196.

The previous prime is 45378191. The next prime is 45378199. The reversal of 45378197 is 79187354.

45378197 is digitally balanced in base 2, 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., 30316036 + 15062161 = 5506^2 + 3881^2 .

It is a cyclic number.

It is not a de Polignac number, because 45378197 - 2²⁴ = 28600981 is a prime.

Together with 45378199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45378191) 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, 22689098 + 22689099.

It is an arithmetic number, because the mean of its divisors is an integer number (22689099).

Almost surely, 2^45378197 is an apocalyptic number.

It is an amenable number.

45378197 is a deficient number, since it is larger than the sum of its proper divisors (1).

45378197 is an equidigital number, since it uses as much as digits as its factorization.

45378197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 45378197 is about 6736.3340920711. The cubic root of 45378197 is about 356.6830010667.

The spelling of 45378197 in words is "forty-five million, three hundred seventy-eight thousand, one hundred ninety-seven".