897731724444 has 12 divisors (see below), whose sum is σ = 2094707357064. Its totient is φ = 299243908144.

The previous prime is 897731724443. The next prime is 897731724499. The reversal of 897731724444 is 444427137798.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897731724443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37405488507 + ... + 37405488530.

It is an arithmetic number, because the mean of its divisors is an integer number (174558946422).

Almost surely, 2^897731724444 is an apocalyptic number.

It is an amenable number.

897731724444 is an abundant number, since it is smaller than the sum of its proper divisors (1196975632620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

897731724444 is a wasteful number, since it uses less digits than its factorization.

897731724444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74810977044 (or 74810977042 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 60.

The spelling of 897731724444 in words is "eight hundred ninety-seven billion, seven hundred thirty-one million, seven hundred twenty-four thousand, four hundred forty-four".