40655317 has 2 divisors, whose sum is σ = 40655318. Its totient is φ = 40655316.

The previous prime is 40655281. The next prime is 40655327. The reversal of 40655317 is 71355604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40056241 + 599076 = 6329^2 + 774^2 .

It is a cyclic number.

It is not a de Polignac number, because 40655317 - 2¹⁹ = 40131029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40655327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20327658 + 20327659.

It is an arithmetic number, because the mean of its divisors is an integer number (20327659).

Almost surely, 2^40655317 is an apocalyptic number.

It is an amenable number.

40655317 is a deficient number, since it is larger than the sum of its proper divisors (1).

40655317 is an equidigital number, since it uses as much as digits as its factorization.

40655317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 40655317 is about 6376.1522096010. The cubic root of 40655317 is about 343.8527092753.

The spelling of 40655317 in words is "forty million, six hundred fifty-five thousand, three hundred seventeen".