40947457 has 2 divisors, whose sum is σ = 40947458. Its totient is φ = 40947456.

The previous prime is 40947443. The next prime is 40947463. The reversal of 40947457 is 75474904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40947201 + 256 = 6399^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 40947457 - 2¹¹ = 40945409 is a prime.

It is not a weakly prime, because it can be changed into another prime (40947437) 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, 20473728 + 20473729.

It is an arithmetic number, because the mean of its divisors is an integer number (20473729).

Almost surely, 2^40947457 is an apocalyptic number.

It is an amenable number.

40947457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40947457 is an equidigital number, since it uses as much as digits as its factorization.

40947457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 40947457 is about 6399.0200030942. The cubic root of 40947457 is about 344.6743605182.

The spelling of 40947457 in words is "forty million, nine hundred forty-seven thousand, four hundred fifty-seven".