40487569 has 2 divisors, whose sum is σ = 40487570. Its totient is φ = 40487568.

The previous prime is 40487563. The next prime is 40487599. The reversal of 40487569 is 96578404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 2849344 = 6135^2 + 1688^2 .

It is a cyclic number.

It is not a de Polignac number, because 40487569 - 2¹¹ = 40485521 is a prime.

It is a super-2 number, since 2×40487569² = 3278486487059522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40487563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20243784 + 20243785.

It is an arithmetic number, because the mean of its divisors is an integer number (20243785).

Almost surely, 2^40487569 is an apocalyptic number.

It is an amenable number.

40487569 is a deficient number, since it is larger than the sum of its proper divisors (1).

40487569 is an equidigital number, since it uses as much as digits as its factorization.

40487569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 40487569 is about 6362.9842841233. The cubic root of 40487569 is about 343.3791335095.

The spelling of 40487569 in words is "forty million, four hundred eighty-seven thousand, five hundred sixty-nine".