44078921 has 2 divisors, whose sum is σ = 44078922. Its totient is φ = 44078920.

The previous prime is 44078911. The next prime is 44078981. The reversal of 44078921 is 12987044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44023225 + 55696 = 6635^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 44078921 - 2¹⁴ = 44062537 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (44078911) 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, 22039460 + 22039461.

It is an arithmetic number, because the mean of its divisors is an integer number (22039461).

Almost surely, 2^44078921 is an apocalyptic number.

It is an amenable number.

44078921 is a deficient number, since it is larger than the sum of its proper divisors (1).

44078921 is an equidigital number, since it uses as much as digits as its factorization.

44078921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 44078921 is about 6639.1958097348. The cubic root of 44078921 is about 353.2457821724.

The spelling of 44078921 in words is "forty-four million, seventy-eight thousand, nine hundred twenty-one".