40780657 has 2 divisors, whose sum is σ = 40780658. Its totient is φ = 40780656.

The previous prime is 40780613. The next prime is 40780667. The reversal of 40780657 is 75608704.

It is a happy number.

40780657 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 can be written as a sum of positive squares in only one way, i.e., 22667121 + 18113536 = 4761^2 + 4256^2 .

It is a cyclic number.

It is not a de Polignac number, because 40780657 - 2⁷ = 40780529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40780667) 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, 20390328 + 20390329.

It is an arithmetic number, because the mean of its divisors is an integer number (20390329).

Almost surely, 2^40780657 is an apocalyptic number.

It is an amenable number.

40780657 is a deficient number, since it is larger than the sum of its proper divisors (1).

40780657 is an equidigital number, since it uses as much as digits as its factorization.

40780657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 40780657 is about 6385.9734575083. The cubic root of 40780657 is about 344.2057117581.

The spelling of 40780657 in words is "forty million, seven hundred eighty thousand, six hundred fifty-seven".