40802173 has 2 divisors, whose sum is σ = 40802174. Its totient is φ = 40802172.

The previous prime is 40802149. The next prime is 40802183. The reversal of 40802173 is 37120804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39463524 + 1338649 = 6282^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 40802173 - 2²⁵ = 7247741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40802123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20401086 + 20401087.

It is an arithmetic number, because the mean of its divisors is an integer number (20401087).

Almost surely, 2^40802173 is an apocalyptic number.

It is an amenable number.

40802173 is a deficient number, since it is larger than the sum of its proper divisors (1).

40802173 is an equidigital number, since it uses as much as digits as its factorization.

40802173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40802173 is about 6387.6578649768. The cubic root of 40802173 is about 344.2662357790.

Adding to 40802173 its reverse (37120804), we get a palindrome (77922977).

The spelling of 40802173 in words is "forty million, eight hundred two thousand, one hundred seventy-three".