97481729 has 4 divisors (see below), whose sum is σ = 97502976. Its totient is φ = 97460484.

The previous prime is 97481719. The next prime is 97481737. The reversal of 97481729 is 92718479.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97481729 - 2²⁰ = 96433153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97481719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569 + ... + 13974.

It is an arithmetic number, because the mean of its divisors is an integer number (24375744).

Almost surely, 2^97481729 is an apocalyptic number.

It is an amenable number.

97481729 is a deficient number, since it is larger than the sum of its proper divisors (21247).

97481729 is a wasteful number, since it uses less digits than its factorization.

97481729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21246.

The product of its digits is 254016, while the sum is 47.

The square root of 97481729 is about 9873.2835976690. The cubic root of 97481729 is about 460.2294523207.

The spelling of 97481729 in words is "ninety-seven million, four hundred eighty-one thousand, seven hundred twenty-nine".