44978809 has 2 divisors, whose sum is σ = 44978810. Its totient is φ = 44978808.

The previous prime is 44978749. The next prime is 44978819. The reversal of 44978809 is 90887944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44622400 + 356409 = 6680^2 + 597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44978809 is a prime.

It is not a weakly prime, because it can be changed into another prime (44978819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22489404 + 22489405.

It is an arithmetic number, because the mean of its divisors is an integer number (22489405).

Almost surely, 2^44978809 is an apocalyptic number.

It is an amenable number.

44978809 is a deficient number, since it is larger than the sum of its proper divisors (1).

44978809 is an equidigital number, since it uses as much as digits as its factorization.

44978809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 44978809 is about 6706.6242626227. The cubic root of 44978809 is about 355.6334889967.

The spelling of 44978809 in words is "forty-four million, nine hundred seventy-eight thousand, eight hundred nine".