40689713 has 2 divisors, whose sum is σ = 40689714. Its totient is φ = 40689712.

The previous prime is 40689709. The next prime is 40689757. The reversal of 40689713 is 31798604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36820624 + 3869089 = 6068^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 40689713 - 2² = 40689709 is a prime.

It is not a weakly prime, because it can be changed into another prime (40689113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20344856 + 20344857.

It is an arithmetic number, because the mean of its divisors is an integer number (20344857).

Almost surely, 2^40689713 is an apocalyptic number.

It is an amenable number.

40689713 is a deficient number, since it is larger than the sum of its proper divisors (1).

40689713 is an equidigital number, since it uses as much as digits as its factorization.

40689713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 40689713 is about 6378.8488773446. The cubic root of 40689713 is about 343.9496529210.

The spelling of 40689713 in words is "forty million, six hundred eighty-nine thousand, seven hundred thirteen".