40617817 has 2 divisors, whose sum is σ = 40617818. Its totient is φ = 40617816.

The previous prime is 40617799. The next prime is 40617821. The reversal of 40617817 is 71871604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38738176 + 1879641 = 6224^2 + 1371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40617817 is a prime.

It is not a weakly prime, because it can be changed into another prime (40617827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20308908 + 20308909.

It is an arithmetic number, because the mean of its divisors is an integer number (20308909).

Almost surely, 2^40617817 is an apocalyptic number.

It is an amenable number.

40617817 is a deficient number, since it is larger than the sum of its proper divisors (1).

40617817 is an equidigital number, since it uses as much as digits as its factorization.

40617817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 40617817 is about 6373.2108862017. The cubic root of 40617817 is about 343.7469548160.

The spelling of 40617817 in words is "forty million, six hundred seventeen thousand, eight hundred seventeen".