997347133147 has 4 divisors (see below), whose sum is σ = 997349171680. Its totient is φ = 997345094616.

The previous prime is 997347133091. The next prime is 997347133193. The reversal of 997347133147 is 741331743799.

997347133147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741331743799 = 22717 ⋅32633347.

It is a 3-Lehmer number, since φ(997347133147) divides (997347133147-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997347133147 is a prime.

It is a super-2 number, since 2×997347133147² (a number of 25 digits) contains 22 as substring.

It is a deceptive number, since it divides R_997347133146.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 997347133091 and 997347133100.

It is not an unprimeable number, because it can be changed into a prime (997347133547) 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, 203854 + ... + 1426972.

It is an arithmetic number, because the mean of its divisors is an integer number (249337292920).

Almost surely, 2^997347133147 is an apocalyptic number.

997347133147 is the 815413-rd pentagonal number.

997347133147 is a deficient number, since it is larger than the sum of its proper divisors (2038533).

997347133147 is a wasteful number, since it uses less digits than its factorization.

997347133147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038532.

The product of its digits is 12002256, while the sum is 58.

The spelling of 997347133147 in words is "nine hundred ninety-seven billion, three hundred forty-seven million, one hundred thirty-three thousand, one hundred forty-seven".