97543644 has 144 divisors (see below), whose sum is σ = 276514560. Its totient is φ = 26484480.

The previous prime is 97543643. The next prime is 97543657. The reversal of 97543644 is 44634579.

Its product of digits (362880) is a multiple of the sum of its prime factors (168).

It is a junction number, because it is equal to n+sod(n) for n = 97543596 and 97543605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97543643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1095952 + ... + 1096040.

It is an arithmetic number, because the mean of its divisors is an integer number (1920240).

Almost surely, 2^97543644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97543644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138257280).

97543644 is an abundant number, since it is smaller than the sum of its proper divisors (178970916).

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

97543644 is a wasteful number, since it uses less digits than its factorization.

97543644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 147 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 97543644 is about 9876.4185816520. The cubic root of 97543644 is about 460.3268691259.

The spelling of 97543644 in words is "ninety-seven million, five hundred forty-three thousand, six hundred forty-four".