40399343 has 2 divisors, whose sum is σ = 40399344. Its totient is φ = 40399342.

The previous prime is 40399321. The next prime is 40399363. The reversal of 40399343 is 34399304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40399343 - 2⁶ = 40399279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40399313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20199671 + 20199672.

It is an arithmetic number, because the mean of its divisors is an integer number (20199672).

Almost surely, 2^40399343 is an apocalyptic number.

40399343 is a deficient number, since it is larger than the sum of its proper divisors (1).

40399343 is an equidigital number, since it uses as much as digits as its factorization.

40399343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 40399343 is about 6356.0477499780. The cubic root of 40399343 is about 343.1295342703.

The spelling of 40399343 in words is "forty million, three hundred ninety-nine thousand, three hundred forty-three".