40290169 has 2 divisors, whose sum is σ = 40290170. Its totient is φ = 40290168.

The previous prime is 40290163. The next prime is 40290197. The reversal of 40290169 is 96109204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38937600 + 1352569 = 6240^2 + 1163^2 .

It is a cyclic number.

It is not a de Polignac number, because 40290169 - 2¹³ = 40281977 is a prime.

It is a super-2 number, since 2×40290169² = 3246595436097122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40290169.

It is not a weakly prime, because it can be changed into another prime (40290163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20145084 + 20145085.

It is an arithmetic number, because the mean of its divisors is an integer number (20145085).

Almost surely, 2^40290169 is an apocalyptic number.

It is an amenable number.

40290169 is a deficient number, since it is larger than the sum of its proper divisors (1).

40290169 is an equidigital number, since it uses as much as digits as its factorization.

40290169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 40290169 is about 6347.4537414620. The cubic root of 40290169 is about 342.8201676974.

The spelling of 40290169 in words is "forty million, two hundred ninety thousand, one hundred sixty-nine".