45640997 has 2 divisors, whose sum is σ = 45640998. Its totient is φ = 45640996.

The previous prime is 45640979. The next prime is 45641009. The reversal of 45640997 is 79904654.

45640997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (45640979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40627876 + 5013121 = 6374^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 45640997 - 2¹⁰ = 45639973 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 (45640927) 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, 22820498 + 22820499.

It is an arithmetic number, because the mean of its divisors is an integer number (22820499).

Almost surely, 2^45640997 is an apocalyptic number.

It is an amenable number.

45640997 is a deficient number, since it is larger than the sum of its proper divisors (1).

45640997 is an equidigital number, since it uses as much as digits as its factorization.

45640997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 45640997 is about 6755.8120903412. The cubic root of 45640997 is about 357.3702321329.

The spelling of 45640997 in words is "forty-five million, six hundred forty thousand, nine hundred ninety-seven".