40069943 has 2 divisors, whose sum is σ = 40069944. Its totient is φ = 40069942.

The previous prime is 40069921. The next prime is 40069951. The reversal of 40069943 is 34996004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40069943 - 2¹⁶ = 40004407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40069963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20034971 + 20034972.

It is an arithmetic number, because the mean of its divisors is an integer number (20034972).

Almost surely, 2^40069943 is an apocalyptic number.

40069943 is a deficient number, since it is larger than the sum of its proper divisors (1).

40069943 is an equidigital number, since it uses as much as digits as its factorization.

40069943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 40069943 is about 6330.0823849299. The cubic root of 40069943 is about 342.1944080102.

The spelling of 40069943 in words is "forty million, sixty-nine thousand, nine hundred forty-three".