40345637 has 2 divisors, whose sum is σ = 40345638. Its totient is φ = 40345636.

The previous prime is 40345631. The next prime is 40345649. The reversal of 40345637 is 73654304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23951236 + 16394401 = 4894^2 + 4049^2 .

It is a cyclic number.

It is not a de Polignac number, because 40345637 - 2⁴ = 40345621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40345631) 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, 20172818 + 20172819.

It is an arithmetic number, because the mean of its divisors is an integer number (20172819).

Almost surely, 2^40345637 is an apocalyptic number.

It is an amenable number.

40345637 is a deficient number, since it is larger than the sum of its proper divisors (1).

40345637 is an equidigital number, since it uses as much as digits as its factorization.

40345637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 40345637 is about 6351.8215497604. The cubic root of 40345637 is about 342.9774172191.

The spelling of 40345637 in words is "forty million, three hundred forty-five thousand, six hundred thirty-seven".