31791145407397 has 8 divisors (see below), whose sum is σ = 31932806283936. Its totient is φ = 31649498669712.

The previous prime is 31791145407379. The next prime is 31791145407421. The reversal of 31791145407397 is 79370454119713.

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 31791145407397 - 2⁷ = 31791145407269 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 (31791145407367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985143 + ... + 8034475.

It is an arithmetic number, because the mean of its divisors is an integer number (3991600785492).

Almost surely, 2^{31791145407397} is an apocalyptic number.

It is an amenable number.

31791145407397 is a deficient number, since it is larger than the sum of its proper divisors (141660876539).

31791145407397 is a wasteful number, since it uses less digits than its factorization.

31791145407397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7069427.

The product of its (nonzero) digits is 20003760, while the sum is 61.

The spelling of 31791145407397 in words is "thirty-one trillion, seven hundred ninety-one billion, one hundred forty-five million, four hundred seven thousand, three hundred ninety-seven".