40382569 has 2 divisors, whose sum is σ = 40382570. Its totient is φ = 40382568.

The previous prime is 40382521. The next prime is 40382591. The reversal of 40382569 is 96528304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23474025 + 16908544 = 4845^2 + 4112^2 .

It is a cyclic number.

It is not a de Polignac number, because 40382569 - 2²³ = 31993961 is a prime.

It is a super-2 number, since 2×40382569² = 3261503758079522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40382369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20191284 + 20191285.

It is an arithmetic number, because the mean of its divisors is an integer number (20191285).

Almost surely, 2^40382569 is an apocalyptic number.

It is an amenable number.

40382569 is a deficient number, since it is larger than the sum of its proper divisors (1).

40382569 is an equidigital number, since it uses as much as digits as its factorization.

40382569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 40382569 is about 6354.7280823022. The cubic root of 40382569 is about 343.0820380228.

The spelling of 40382569 in words is "forty million, three hundred eighty-two thousand, five hundred sixty-nine".