40547393 has 2 divisors, whose sum is σ = 40547394. Its totient is φ = 40547392.

The previous prime is 40547369. The next prime is 40547399. The reversal of 40547393 is 39374504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20584369 + 19963024 = 4537^2 + 4468^2 .

It is a cyclic number.

It is not a de Polignac number, because 40547393 - 2¹² = 40543297 is a prime.

It is not a weakly prime, because it can be changed into another prime (40547399) 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, 20273696 + 20273697.

It is an arithmetic number, because the mean of its divisors is an integer number (20273697).

Almost surely, 2^40547393 is an apocalyptic number.

It is an amenable number.

40547393 is a deficient number, since it is larger than the sum of its proper divisors (1).

40547393 is an equidigital number, since it uses as much as digits as its factorization.

40547393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 40547393 is about 6367.6834877371. The cubic root of 40547393 is about 343.5481747270.

Subtracting from 40547393 its reverse (39374504), we obtain a square (1172889 = 1083²).

The spelling of 40547393 in words is "forty million, five hundred forty-seven thousand, three hundred ninety-three".