40188773 has 2 divisors, whose sum is σ = 40188774. Its totient is φ = 40188772.

The previous prime is 40188739. The next prime is 40188817. The reversal of 40188773 is 37788104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38464804 + 1723969 = 6202^2 + 1313^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40188773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40182773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20094386 + 20094387.

It is an arithmetic number, because the mean of its divisors is an integer number (20094387).

Almost surely, 2^40188773 is an apocalyptic number.

It is an amenable number.

40188773 is a deficient number, since it is larger than the sum of its proper divisors (1).

40188773 is an equidigital number, since it uses as much as digits as its factorization.

40188773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 40188773 is about 6339.4615701966. The cubic root of 40188773 is about 342.5323407044.

The spelling of 40188773 in words is "forty million, one hundred eighty-eight thousand, seven hundred seventy-three".