44781091 has 2 divisors, whose sum is σ = 44781092. Its totient is φ = 44781090.

The previous prime is 44781041. The next prime is 44781101. The reversal of 44781091 is 19018744.

44781091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 44781091 - 2⁷ = 44780963 is a prime.

It is a super-2 number, since 2×44781091² = 4010692222300562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (44781031) 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, 22390545 + 22390546.

It is an arithmetic number, because the mean of its divisors is an integer number (22390546).

Almost surely, 2^44781091 is an apocalyptic number.

44781091 is a deficient number, since it is larger than the sum of its proper divisors (1).

44781091 is an equidigital number, since it uses as much as digits as its factorization.

44781091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 44781091 is about 6691.8675270809. The cubic root of 44781091 is about 355.1116252820. Note that the first 3 decimals are identical.

The spelling of 44781091 in words is "forty-four million, seven hundred eighty-one thousand, ninety-one".