40780849 has 2 divisors, whose sum is σ = 40780850. Its totient is φ = 40780848.

The previous prime is 40780787. The next prime is 40780867. The reversal of 40780849 is 94808704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29084449 + 11696400 = 5393^2 + 3420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40780849 is a prime.

It is equal to p_2478289 and since 40780849 and 2478289 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40780889) 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, 20390424 + 20390425.

It is an arithmetic number, because the mean of its divisors is an integer number (20390425).

Almost surely, 2^40780849 is an apocalyptic number.

It is an amenable number.

40780849 is a deficient number, since it is larger than the sum of its proper divisors (1).

40780849 is an equidigital number, since it uses as much as digits as its factorization.

40780849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 40780849 is about 6385.9884904375. The cubic root of 40780849 is about 344.2062519439.

The spelling of 40780849 in words is "forty million, seven hundred eighty thousand, eight hundred forty-nine".