40209733 has 2 divisors, whose sum is σ = 40209734. Its totient is φ = 40209732.

The previous prime is 40209703. The next prime is 40209751. The reversal of 40209733 is 33790204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32012964 + 8196769 = 5658^2 + 2863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40209733 is a prime.

It is equal to p_2445616 and since 40209733 and 2445616 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40209703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20104866 + 20104867.

It is an arithmetic number, because the mean of its divisors is an integer number (20104867).

Almost surely, 2^40209733 is an apocalyptic number.

It is an amenable number.

40209733 is a deficient number, since it is larger than the sum of its proper divisors (1).

40209733 is an equidigital number, since it uses as much as digits as its factorization.

40209733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 40209733 is about 6341.1144919486. The cubic root of 40209733 is about 342.5918783113.

Adding to 40209733 its reverse (33790204), we get a palindrome (73999937).

The spelling of 40209733 in words is "forty million, two hundred nine thousand, seven hundred thirty-three".