45039889 has 2 divisors, whose sum is σ = 45039890. Its totient is φ = 45039888.

The previous prime is 45039887. The next prime is 45039941. The reversal of 45039889 is 98893054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30470400 + 14569489 = 5520^2 + 3817^2 .

It is a cyclic number.

It is not a de Polignac number, because 45039889 - 2¹ = 45039887 is a prime.

It is a super-2 number, since 2×45039889² = 4057183202264642, which contains 22 as substring.

Together with 45039887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (45039881) 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 as a sum of consecutive naturals, namely, 22519944 + 22519945.

It is an arithmetic number, because the mean of its divisors is an integer number (22519945).

Almost surely, 2^45039889 is an apocalyptic number.

It is an amenable number.

45039889 is a deficient number, since it is larger than the sum of its proper divisors (1).

45039889 is an equidigital number, since it uses as much as digits as its factorization.

45039889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 45039889 is about 6711.1764244430. The cubic root of 45039889 is about 355.7943963864.

The spelling of 45039889 in words is "forty-five million, thirty-nine thousand, eight hundred eighty-nine".