97543720 has 32 divisors (see below), whose sum is σ = 231026400. Its totient is φ = 36963648.

The previous prime is 97543711. The next prime is 97543751. The reversal of 97543720 is 2734579.

It is a super-2 number, since 2×97543720² = 19029554622876800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97543720.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63414 + ... + 64933.

It is an arithmetic number, because the mean of its divisors is an integer number (7219575).

Almost surely, 2^97543720 is an apocalyptic number.

It is an amenable number.

97543720 is an abundant number, since it is smaller than the sum of its proper divisors (133482680).

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

97543720 is a wasteful number, since it uses less digits than its factorization.

97543720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128377 (or 128373 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 97543720 is about 9876.4224291998. The cubic root of 97543720 is about 460.3269886787.

The spelling of 97543720 in words is "ninety-seven million, five hundred forty-three thousand, seven hundred twenty".