40609637 has 2 divisors, whose sum is σ = 40609638. Its totient is φ = 40609636.

The previous prime is 40609633. The next prime is 40609661. The reversal of 40609637 is 73690604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40018276 + 591361 = 6326^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 40609637 - 2² = 40609633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40609597 and 40609606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40609633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20304818 + 20304819.

It is an arithmetic number, because the mean of its divisors is an integer number (20304819).

Almost surely, 2^40609637 is an apocalyptic number.

It is an amenable number.

40609637 is a deficient number, since it is larger than the sum of its proper divisors (1).

40609637 is an equidigital number, since it uses as much as digits as its factorization.

40609637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 40609637 is about 6372.5691051569. The cubic root of 40609637 is about 343.7238775962.

The spelling of 40609637 in words is "forty million, six hundred nine thousand, six hundred thirty-seven".