40858717 has 2 divisors, whose sum is σ = 40858718. Its totient is φ = 40858716.

The previous prime is 40858711. The next prime is 40858733. The reversal of 40858717 is 71785804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37810201 + 3048516 = 6149^2 + 1746^2 .

It is a cyclic number.

It is not a de Polignac number, because 40858717 - 2¹⁹ = 40334429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40858717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40858711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20429358 + 20429359.

It is an arithmetic number, because the mean of its divisors is an integer number (20429359).

Almost surely, 2^40858717 is an apocalyptic number.

It is an amenable number.

40858717 is a deficient number, since it is larger than the sum of its proper divisors (1).

40858717 is an equidigital number, since it uses as much as digits as its factorization.

40858717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 40858717 is about 6392.0823680550. The cubic root of 40858717 is about 344.4251914047.

The spelling of 40858717 in words is "forty million, eight hundred fifty-eight thousand, seven hundred seventeen".