40802143 has 2 divisors, whose sum is σ = 40802144. Its totient is φ = 40802142.

The previous prime is 40802131. The next prime is 40802147. The reversal of 40802143 is 34120804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40802143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40802147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20401071 + 20401072.

It is an arithmetic number, because the mean of its divisors is an integer number (20401072).

Almost surely, 2^40802143 is an apocalyptic number.

40802143 is a deficient number, since it is larger than the sum of its proper divisors (1).

40802143 is an equidigital number, since it uses as much as digits as its factorization.

40802143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 40802143 is about 6387.6555166978. The cubic root of 40802143 is about 344.2661514045.

Adding to 40802143 its reverse (34120804), we get a palindrome (74922947).

The spelling of 40802143 in words is "forty million, eight hundred two thousand, one hundred forty-three".