31368785417 has 4 divisors (see below), whose sum is σ = 31568586756. Its totient is φ = 31168984080.

The previous prime is 31368785341. The next prime is 31368785429. The reversal of 31368785417 is 71458786313.

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 11368037641 + 20000747776 = 106621^2 + 141424^2 .

It is a cyclic number.

It is not a de Polignac number, because 31368785417 - 2¹² = 31368781321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31368785447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99900434 + ... + 99900747.

It is an arithmetic number, because the mean of its divisors is an integer number (7892146689).

Almost surely, 2^31368785417 is an apocalyptic number.

It is an amenable number.

31368785417 is a deficient number, since it is larger than the sum of its proper divisors (199801339).

31368785417 is a wasteful number, since it uses less digits than its factorization.

31368785417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199801338.

The product of its digits is 3386880, while the sum is 53.

The spelling of 31368785417 in words is "thirty-one billion, three hundred sixty-eight million, seven hundred eighty-five thousand, four hundred seventeen".