45636421 has 2 divisors, whose sum is σ = 45636422. Its totient is φ = 45636420.

The previous prime is 45636419. The next prime is 45636443. The reversal of 45636421 is 12463654.

45636421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34680321 + 10956100 = 5889^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 45636421 - 2¹ = 45636419 is a prime.

Together with 45636419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45636491) 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, 22818210 + 22818211.

It is an arithmetic number, because the mean of its divisors is an integer number (22818211).

Almost surely, 2^45636421 is an apocalyptic number.

It is an amenable number.

45636421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45636421 is an equidigital number, since it uses as much as digits as its factorization.

45636421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 45636421 is about 6755.4734105020. The cubic root of 45636421 is about 357.3582883328.

The spelling of 45636421 in words is "forty-five million, six hundred thirty-six thousand, four hundred twenty-one".