897706524643 has 4 divisors (see below), whose sum is σ = 897739581240. Its totient is φ = 897673468048.

The previous prime is 897706524623. The next prime is 897706524679. The reversal of 897706524643 is 346425607798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346425607798 = 2 ⋅173212803899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897706524643 is a prime.

It is a super-2 number, since 2×897706524643² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897706524623) 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 3 ways as a sum of consecutive naturals, for example, 16487530 + ... + 16541887.

It is an arithmetic number, because the mean of its divisors is an integer number (224434895310).

Almost surely, 2^897706524643 is an apocalyptic number.

897706524643 is a deficient number, since it is larger than the sum of its proper divisors (33056597).

897706524643 is a wasteful number, since it uses less digits than its factorization.

897706524643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33056596.

The product of its (nonzero) digits is 60963840, while the sum is 61.

The spelling of 897706524643 in words is "eight hundred ninety-seven billion, seven hundred six million, five hundred twenty-four thousand, six hundred forty-three".