45780809 has 2 divisors, whose sum is σ = 45780810. Its totient is φ = 45780808.

The previous prime is 45780797. The next prime is 45780827. The reversal of 45780809 is 90808754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 10259209 = 5960^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 45780809 - 2⁴ = 45780793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45780859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22890404 + 22890405.

It is an arithmetic number, because the mean of its divisors is an integer number (22890405).

Almost surely, 2^45780809 is an apocalyptic number.

It is an amenable number.

45780809 is a deficient number, since it is larger than the sum of its proper divisors (1).

45780809 is an equidigital number, since it uses as much as digits as its factorization.

45780809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 45780809 is about 6766.1517127537. The cubic root of 45780809 is about 357.7347707272.

The spelling of 45780809 in words is "forty-five million, seven hundred eighty thousand, eight hundred nine".