40740043 has 2 divisors, whose sum is σ = 40740044. Its totient is φ = 40740042.

The previous prime is 40739999. The next prime is 40740113. The reversal of 40740043 is 34004704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40740043 - 2¹³ = 40731851 is a prime.

It is a super-2 number, since 2×40740043² = 3319502207283698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40739996 and 40740023.

It is not a weakly prime, because it can be changed into another prime (40740443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20370021 + 20370022.

It is an arithmetic number, because the mean of its divisors is an integer number (20370022).

Almost surely, 2^40740043 is an apocalyptic number.

40740043 is a deficient number, since it is larger than the sum of its proper divisors (1).

40740043 is an equidigital number, since it uses as much as digits as its factorization.

40740043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 40740043 is about 6382.7927273256. The cubic root of 40740043 is about 344.0914074515.

Adding to 40740043 its reverse (34004704), we get a palindrome (74744747).

The spelling of 40740043 in words is "forty million, seven hundred forty thousand, forty-three".