40689433 has 2 divisors, whose sum is σ = 40689434. Its totient is φ = 40689432.

The previous prime is 40689421. The next prime is 40689437. The reversal of 40689433 is 33498604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26491609 + 14197824 = 5147^2 + 3768^2 .

It is a cyclic number.

It is not a de Polignac number, because 40689433 - 2⁵ = 40689401 is a prime.

It is a super-2 number, since 2×40689433² = 3311259915722978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40689392 and 40689401.

It is not a weakly prime, because it can be changed into another prime (40689437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20344716 + 20344717.

It is an arithmetic number, because the mean of its divisors is an integer number (20344717).

Almost surely, 2^40689433 is an apocalyptic number.

It is an amenable number.

40689433 is a deficient number, since it is larger than the sum of its proper divisors (1).

40689433 is an equidigital number, since it uses as much as digits as its factorization.

40689433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 40689433 is about 6378.8269297732. The cubic root of 40689433 is about 343.9488639737.

The spelling of 40689433 in words is "forty million, six hundred eighty-nine thousand, four hundred thirty-three".