997001538713 has 4 divisors (see below), whose sum is σ = 1001280515508. Its totient is φ = 992722561920.

The previous prime is 997001538677. The next prime is 997001538773. The reversal of 997001538713 is 317835100799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 317835100799 = 367 ⋅866035697.

It can be written as a sum of positive squares in 2 ways, for example, as 205618716304 + 791382822409 = 453452^2 + 889597^2 .

It is a cyclic number.

It is not a de Polignac number, because 997001538713 - 2⁶ = 997001538649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997001538773) 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, 2139488048 + ... + 2139488513.

It is an arithmetic number, because the mean of its divisors is an integer number (250320128877).

Almost surely, 2^997001538713 is an apocalyptic number.

It is an amenable number.

997001538713 is a deficient number, since it is larger than the sum of its proper divisors (4278976795).

997001538713 is a wasteful number, since it uses less digits than its factorization.

997001538713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278976794.

The product of its (nonzero) digits is 1428840, while the sum is 53.

The spelling of 997001538713 in words is "nine hundred ninety-seven billion, one million, five hundred thirty-eight thousand, seven hundred thirteen".