40234031909 has 4 divisors (see below), whose sum is σ = 40283038860. Its totient is φ = 40185024960.

The previous prime is 40234031899. The next prime is 40234031921. The reversal of 40234031909 is 90913043204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24491311009 + 15742720900 = 156497^2 + 125470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40234031909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40234031939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24502244 + ... + 24503885.

It is an arithmetic number, because the mean of its divisors is an integer number (10070759715).

Almost surely, 2^40234031909 is an apocalyptic number.

It is an amenable number.

40234031909 is a deficient number, since it is larger than the sum of its proper divisors (49006951).

40234031909 is an equidigital number, since it uses as much as digits as its factorization.

40234031909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49006950.

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

The spelling of 40234031909 in words is "forty billion, two hundred thirty-four million, thirty-one thousand, nine hundred nine".