40431383 has 2 divisors, whose sum is σ = 40431384. Its totient is φ = 40431382.

The previous prime is 40431367. The next prime is 40431407. The reversal of 40431383 is 38313404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40431383 - 2⁴ = 40431367 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_2458340 and since 40431383 and 2458340 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40431323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20215691 + 20215692.

It is an arithmetic number, because the mean of its divisors is an integer number (20215692).

Almost surely, 2^40431383 is an apocalyptic number.

40431383 is a deficient number, since it is larger than the sum of its proper divisors (1).

40431383 is an equidigital number, since it uses as much as digits as its factorization.

40431383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 40431383 is about 6358.5676846284. The cubic root of 40431383 is about 343.2202202765.

Adding to 40431383 its reverse (38313404), we get a palindrome (78744787).

The spelling of 40431383 in words is "forty million, four hundred thirty-one thousand, three hundred eighty-three".