40354693 has 2 divisors, whose sum is σ = 40354694. Its totient is φ = 40354692.

The previous prime is 40354687. The next prime is 40354697. The reversal of 40354693 is 39645304.

It is a happy number.

40354693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35545444 + 4809249 = 5962^2 + 2193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40354693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40354697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20177346 + 20177347.

It is an arithmetic number, because the mean of its divisors is an integer number (20177347).

Almost surely, 2^40354693 is an apocalyptic number.

It is an amenable number.

40354693 is a deficient number, since it is larger than the sum of its proper divisors (1).

40354693 is an equidigital number, since it uses as much as digits as its factorization.

40354693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 40354693 is about 6352.5343761368. The cubic root of 40354693 is about 343.0030769216.

Adding to 40354693 its reverse (39645304), we get a palindrome (79999997).

The spelling of 40354693 in words is "forty million, three hundred fifty-four thousand, six hundred ninety-three".