40231693 has 2 divisors, whose sum is σ = 40231694. Its totient is φ = 40231692.

The previous prime is 40231657. The next prime is 40231727. The reversal of 40231693 is 39613204.

40231693 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., 38105929 + 2125764 = 6173^2 + 1458^2 .

It is a cyclic number.

It is not a de Polignac number, because 40231693 - 2²¹ = 38134541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40231603) 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, 20115846 + 20115847.

It is an arithmetic number, because the mean of its divisors is an integer number (20115847).

Almost surely, 2^40231693 is an apocalyptic number.

It is an amenable number.

40231693 is a deficient number, since it is larger than the sum of its proper divisors (1).

40231693 is an equidigital number, since it uses as much as digits as its factorization.

40231693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 40231693 is about 6342.8458124094. The cubic root of 40231693 is about 342.6542342627.

Adding to 40231693 its reverse (39613204), we get a palindrome (79844897).

The spelling of 40231693 in words is "forty million, two hundred thirty-one thousand, six hundred ninety-three".