40802543 has 2 divisors, whose sum is σ = 40802544. Its totient is φ = 40802542.

The previous prime is 40802521. The next prime is 40802549. The reversal of 40802543 is 34520804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40802543 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40802549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20401271 + 20401272.

It is an arithmetic number, because the mean of its divisors is an integer number (20401272).

Almost surely, 2^40802543 is an apocalyptic number.

40802543 is a deficient number, since it is larger than the sum of its proper divisors (1).

40802543 is an equidigital number, since it uses as much as digits as its factorization.

40802543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 40802543 is about 6387.6868270134. The cubic root of 40802543 is about 344.2672763945.

The spelling of 40802543 in words is "forty million, eight hundred two thousand, five hundred forty-three".