40344637 has 2 divisors, whose sum is σ = 40344638. Its totient is φ = 40344636.

The previous prime is 40344593. The next prime is 40344641. The reversal of 40344637 is 73644304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36832761 + 3511876 = 6069^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 40344637 - 2⁷ = 40344509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40344599 and 40344608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40344037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20172318 + 20172319.

It is an arithmetic number, because the mean of its divisors is an integer number (20172319).

Almost surely, 2^40344637 is an apocalyptic number.

It is an amenable number.

40344637 is a deficient number, since it is larger than the sum of its proper divisors (1).

40344637 is an equidigital number, since it uses as much as digits as its factorization.

40344637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 31.

The square root of 40344637 is about 6351.7428316959. The cubic root of 40344637 is about 342.9745835360.

The spelling of 40344637 in words is "forty million, three hundred forty-four thousand, six hundred thirty-seven".