45645437 has 2 divisors, whose sum is σ = 45645438. Its totient is φ = 45645436.

The previous prime is 45645433. The next prime is 45645443. The reversal of 45645437 is 73454654.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44702596 + 942841 = 6686^2 + 971^2 .

It is a cyclic number.

It is not a de Polignac number, because 45645437 - 2² = 45645433 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45645437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45645433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22822718 + 22822719.

It is an arithmetic number, because the mean of its divisors is an integer number (22822719).

Almost surely, 2^45645437 is an apocalyptic number.

It is an amenable number.

45645437 is a deficient number, since it is larger than the sum of its proper divisors (1).

45645437 is an equidigital number, since it uses as much as digits as its factorization.

45645437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 38.

The square root of 45645437 is about 6756.1406882924. The cubic root of 45645437 is about 357.3818201969.

It can be divided in two parts, 4564 and 5437, that added together give a palindrome (10001).

The spelling of 45645437 in words is "forty-five million, six hundred forty-five thousand, four hundred thirty-seven".