31408673447 has 4 divisors (see below), whose sum is σ = 31409318160. Its totient is φ = 31408028736.

The previous prime is 31408673441. The next prime is 31408673449. The reversal of 31408673447 is 74437680413.

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

It is a cyclic number.

It is not a de Polignac number, because 31408673447 - 2¹⁰ = 31408672423 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 (31408673441) 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, 242723 + ... + 348900.

It is an arithmetic number, because the mean of its divisors is an integer number (7852329540).

Almost surely, 2^31408673447 is an apocalyptic number.

31408673447 is a deficient number, since it is larger than the sum of its proper divisors (644713).

31408673447 is an equidigital number, since it uses as much as digits as its factorization.

31408673447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644712.

The product of its (nonzero) digits is 1354752, while the sum is 47.

The spelling of 31408673447 in words is "thirty-one billion, four hundred eight million, six hundred seventy-three thousand, four hundred forty-seven".