45087191 has 2 divisors, whose sum is σ = 45087192. Its totient is φ = 45087190.

The previous prime is 45087149. The next prime is 45087197. The reversal of 45087191 is 19178054.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45087191 is a 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 (45087197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22543595 + 22543596.

It is an arithmetic number, because the mean of its divisors is an integer number (22543596).

Almost surely, 2^45087191 is an apocalyptic number.

45087191 is a deficient number, since it is larger than the sum of its proper divisors (1).

45087191 is an equidigital number, since it uses as much as digits as its factorization.

45087191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 45087191 is about 6714.6996209808. The cubic root of 45087191 is about 355.9189074858.

The spelling of 45087191 in words is "forty-five million, eighty-seven thousand, one hundred ninety-one".