45642791 has 2 divisors, whose sum is σ = 45642792. Its totient is φ = 45642790.

The previous prime is 45642767. The next prime is 45642829. The reversal of 45642791 is 19724654.

45642791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (45642829) can be obtained adding 45642791 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45642791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45642761) 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, 22821395 + 22821396.

It is an arithmetic number, because the mean of its divisors is an integer number (22821396).

Almost surely, 2^45642791 is an apocalyptic number.

45642791 is a deficient number, since it is larger than the sum of its proper divisors (1).

45642791 is an equidigital number, since it uses as much as digits as its factorization.

45642791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 45642791 is about 6755.9448635998. The cubic root of 45642791 is about 357.3749144276.

The spelling of 45642791 in words is "forty-five million, six hundred forty-two thousand, seven hundred ninety-one".