45388813 has 4 divisors (see below), whose sum is σ = 45465948. Its totient is φ = 45311680.

The previous prime is 45388801. The next prime is 45388831. The reversal of 45388813 is 31888354.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17952169 + 27436644 = 4237^2 + 5238^2 .

It is a cyclic number.

It is not a de Polignac number, because 45388813 - 2⁵ = 45388781 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45388883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37678 + ... + 38863.

It is an arithmetic number, because the mean of its divisors is an integer number (11366487).

Almost surely, 2^45388813 is an apocalyptic number.

It is an amenable number.

45388813 is a deficient number, since it is larger than the sum of its proper divisors (77135).

45388813 is an equidigital number, since it uses as much as digits as its factorization.

45388813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77134.

The product of its digits is 92160, while the sum is 40.

The square root of 45388813 is about 6737.1220116605. The cubic root of 45388813 is about 356.7108136268.

The spelling of 45388813 in words is "forty-five million, three hundred eighty-eight thousand, eight hundred thirteen".