45378191 has 2 divisors, whose sum is σ = 45378192. Its totient is φ = 45378190.

The previous prime is 45378143. The next prime is 45378197. The reversal of 45378191 is 19187354.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45378191 - 2¹⁴ = 45361807 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45378197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22689095 + 22689096.

It is an arithmetic number, because the mean of its divisors is an integer number (22689096).

Almost surely, 2^45378191 is an apocalyptic number.

45378191 is a deficient number, since it is larger than the sum of its proper divisors (1).

45378191 is an equidigital number, since it uses as much as digits as its factorization.

45378191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 45378191 is about 6736.3336467250. Note that the first 3 decimals coincide. The cubic root of 45378191 is about 356.6829853463.

The spelling of 45378191 in words is "forty-five million, three hundred seventy-eight thousand, one hundred ninety-one".