40635169 has 2 divisors, whose sum is σ = 40635170. Its totient is φ = 40635168.

The previous prime is 40635137. The next prime is 40635187. The reversal of 40635169 is 96153604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 439569 = 6340^2 + 663^2 .

It is a cyclic number.

It is not a de Polignac number, because 40635169 - 2⁵ = 40635137 is a prime.

It is a super-2 number, since 2×40635169² = 3302433919317122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40630169) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20317584 + 20317585.

It is an arithmetic number, because the mean of its divisors is an integer number (20317585).

Almost surely, 2^40635169 is an apocalyptic number.

It is an amenable number.

40635169 is a deficient number, since it is larger than the sum of its proper divisors (1).

40635169 is an equidigital number, since it uses as much as digits as its factorization.

40635169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 40635169 is about 6374.5720640683. The cubic root of 40635169 is about 343.7958976070.

It can be divided in two parts, 40635 and 169, that added together give a palindrome (40804).

The spelling of 40635169 in words is "forty million, six hundred thirty-five thousand, one hundred sixty-nine".