40340437 has 2 divisors, whose sum is σ = 40340438. Its totient is φ = 40340436.

The previous prime is 40340387. The next prime is 40340449. The reversal of 40340437 is 73404304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29311396 + 11029041 = 5414^2 + 3321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40340437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40340497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20170218 + 20170219.

It is an arithmetic number, because the mean of its divisors is an integer number (20170219).

Almost surely, 2^40340437 is an apocalyptic number.

It is an amenable number.

40340437 is a deficient number, since it is larger than the sum of its proper divisors (1).

40340437 is an equidigital number, since it uses as much as digits as its factorization.

40340437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 40340437 is about 6351.4122051714. The cubic root of 40340437 is about 342.9626815556.

The spelling of 40340437 in words is "forty million, three hundred forty thousand, four hundred thirty-seven".