40437431 has 2 divisors, whose sum is σ = 40437432. Its totient is φ = 40437430.

The previous prime is 40437403. The next prime is 40437433. The reversal of 40437431 is 13473404.

40437431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40437431 - 2⁶ = 40437367 is a prime.

It is a super-2 number, since 2×40437431² = 3270371651759522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 40437433, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40437431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40437433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20218715 + 20218716.

It is an arithmetic number, because the mean of its divisors is an integer number (20218716).

Almost surely, 2^40437431 is an apocalyptic number.

40437431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40437431 is an equidigital number, since it uses as much as digits as its factorization.

40437431 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 40437431 is about 6359.0432456463. The cubic root of 40437431 is about 343.2373331580.

The spelling of 40437431 in words is "forty million, four hundred thirty-seven thousand, four hundred thirty-one".