40824169 has 2 divisors, whose sum is σ = 40824170. Its totient is φ = 40824168.

The previous prime is 40824167. The next prime is 40824221. The reversal of 40824169 is 96142804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40487769 + 336400 = 6363^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 40824169 - 2¹ = 40824167 is a prime.

It is a super-2 number, since 2×40824169² = 3333225549081122, which contains 22 as substring.

Together with 40824167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40824167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20412084 + 20412085.

It is an arithmetic number, because the mean of its divisors is an integer number (20412085).

Almost surely, 2^40824169 is an apocalyptic number.

It is an amenable number.

40824169 is a deficient number, since it is larger than the sum of its proper divisors (1).

40824169 is an equidigital number, since it uses as much as digits as its factorization.

40824169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 40824169 is about 6389.3793908329. The cubic root of 40824169 is about 344.3280880385.

The spelling of 40824169 in words is "forty million, eight hundred twenty-four thousand, one hundred sixty-nine".