40143473 has 2 divisors, whose sum is σ = 40143474. Its totient is φ = 40143472.

The previous prime is 40143457. The next prime is 40143479. The reversal of 40143473 is 37434104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27384289 + 12759184 = 5233^2 + 3572^2 .

It is a cyclic number.

It is not a de Polignac number, because 40143473 - 2⁴ = 40143457 is a prime.

It is a super-2 number, since 2×40143473² = 3222996849003458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40143479) 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, 20071736 + 20071737.

It is an arithmetic number, because the mean of its divisors is an integer number (20071737).

Almost surely, 2^40143473 is an apocalyptic number.

It is an amenable number.

40143473 is a deficient number, since it is larger than the sum of its proper divisors (1).

40143473 is an equidigital number, since it uses as much as digits as its factorization.

40143473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 40143473 is about 6335.8877041816. The cubic root of 40143473 is about 342.4035937305.

Adding to 40143473 its reverse (37434104), we get a palindrome (77577577).

The spelling of 40143473 in words is "forty million, one hundred forty-three thousand, four hundred seventy-three".