31287694429189 has 8 divisors (see below), whose sum is σ = 35928452933280. Its totient is φ = 26946339699600.

The previous prime is 31287694429099. The next prime is 31287694429213. The reversal of 31287694429189 is 98192449678213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31287694429189 - 2⁴¹ = 29088671173637 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 (31287694421189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74850943402 + ... + 74850943819.

It is an arithmetic number, because the mean of its divisors is an integer number (4491056616660).

Almost surely, 2^{31287694429189} is an apocalyptic number.

It is an amenable number.

31287694429189 is a deficient number, since it is larger than the sum of its proper divisors (4640758504091).

31287694429189 is a wasteful number, since it uses less digits than its factorization.

31287694429189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149701887251.

The product of its digits is 376233984, while the sum is 73.

The spelling of 31287694429189 in words is "thirty-one trillion, two hundred eighty-seven billion, six hundred ninety-four million, four hundred twenty-nine thousand, one hundred eighty-nine".