40078417 has 2 divisors, whose sum is σ = 40078418. Its totient is φ = 40078416.

The previous prime is 40078411. The next prime is 40078421. The reversal of 40078417 is 71487004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20151121 + 19927296 = 4489^2 + 4464^2 .

It is a cyclic number.

It is not a de Polignac number, because 40078417 - 2¹⁹ = 39554129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40078411) 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, 20039208 + 20039209.

It is an arithmetic number, because the mean of its divisors is an integer number (20039209).

Almost surely, 2^40078417 is an apocalyptic number.

It is an amenable number.

40078417 is a deficient number, since it is larger than the sum of its proper divisors (1).

40078417 is an equidigital number, since it uses as much as digits as its factorization.

40078417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 40078417 is about 6330.7516931246. The cubic root of 40078417 is about 342.2185287585.

The spelling of 40078417 in words is "forty million, seventy-eight thousand, four hundred seventeen".