40445437 has 2 divisors, whose sum is σ = 40445438. Its totient is φ = 40445436.

The previous prime is 40445417. The next prime is 40445443. The reversal of 40445437 is 73454404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35688676 + 4756761 = 5974^2 + 2181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40445437 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40445399 and 40445408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40445417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222718 + 20222719.

It is an arithmetic number, because the mean of its divisors is an integer number (20222719).

Almost surely, 2^40445437 is an apocalyptic number.

It is an amenable number.

40445437 is a deficient number, since it is larger than the sum of its proper divisors (1).

40445437 is an equidigital number, since it uses as much as digits as its factorization.

40445437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 40445437 is about 6359.6727117046. The cubic root of 40445437 is about 343.2599835975.

The spelling of 40445437 in words is "forty million, four hundred forty-five thousand, four hundred thirty-seven".