140223421409 has 4 divisors (see below), whose sum is σ = 143643504900. Its totient is φ = 136803337920.

The previous prime is 140223421399. The next prime is 140223421411. The reversal of 140223421409 is 904124322041.

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 1947280384 + 138276141025 = 44128^2 + 371855^2 .

It is a cyclic number.

It is not a de Polignac number, because 140223421409 - 2⁸ = 140223421153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140223421439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1710041684 + ... + 1710041765.

It is an arithmetic number, because the mean of its divisors is an integer number (35910876225).

Almost surely, 2^140223421409 is an apocalyptic number.

It is an amenable number.

140223421409 is a deficient number, since it is larger than the sum of its proper divisors (3420083491).

140223421409 is an equidigital number, since it uses as much as digits as its factorization.

140223421409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420083490.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 140223421409 in words is "one hundred forty billion, two hundred twenty-three million, four hundred twenty-one thousand, four hundred nine".