97705581 has 8 divisors (see below), whose sum is σ = 137130720. Its totient is φ = 61708752.

The previous prime is 97705577. The next prime is 97705603. The reversal of 97705581 is 18550779.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97705581 - 2² = 97705577 is a prime.

It is a super-2 number, since 2×97705581² = 19092761117095122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97705561) 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 7 ways as a sum of consecutive naturals, for example, 857010 + ... + 857123.

It is an arithmetic number, because the mean of its divisors is an integer number (17141340).

Almost surely, 2^97705581 is an apocalyptic number.

It is an amenable number.

97705581 is a deficient number, since it is larger than the sum of its proper divisors (39425139).

97705581 is a wasteful number, since it uses less digits than its factorization.

97705581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714155.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 97705581 is about 9884.6133460040. The cubic root of 97705581 is about 460.5814653791.

It can be divided in two parts, 9770 and 5581, that added together give a palindrome (15351).

The spelling of 97705581 in words is "ninety-seven million, seven hundred five thousand, five hundred eighty-one".