40207697 has 2 divisors, whose sum is σ = 40207698. Its totient is φ = 40207696.

The previous prime is 40207693. The next prime is 40207721. The reversal of 40207697 is 79670204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31820881 + 8386816 = 5641^2 + 2896^2 .

It is a cyclic number.

It is not a de Polignac number, because 40207697 - 2² = 40207693 is a prime.

It is not a weakly prime, because it can be changed into another prime (40207693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20103848 + 20103849.

It is an arithmetic number, because the mean of its divisors is an integer number (20103849).

Almost surely, 2^40207697 is an apocalyptic number.

It is an amenable number.

40207697 is a deficient number, since it is larger than the sum of its proper divisors (1).

40207697 is an equidigital number, since it uses as much as digits as its factorization.

40207697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 40207697 is about 6340.9539503138. The cubic root of 40207697 is about 342.5860958901.

It can be divided in two parts, 40207 and 697, that added together give a palindrome (40904).

The spelling of 40207697 in words is "forty million, two hundred seven thousand, six hundred ninety-seven".