97698809 has 8 divisors (see below), whose sum is σ = 105824712. Its totient is φ = 89660160.

The previous prime is 97698793. The next prime is 97698827. The reversal of 97698809 is 90889679.

It can be written as a sum of positive squares in 4 ways, for example, as 11580409 + 86118400 = 3403^2 + 9280^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 97698809 - 2⁴ = 97698793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97698829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19472 + ... + 23969.

It is an arithmetic number, because the mean of its divisors is an integer number (13228089).

Almost surely, 2^97698809 is an apocalyptic number.

It is an amenable number.

97698809 is a deficient number, since it is larger than the sum of its proper divisors (8125903).

97698809 is a wasteful number, since it uses less digits than its factorization.

97698809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43627.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The square root of 97698809 is about 9884.2707874683. The cubic root of 97698809 is about 460.5708241250.

The spelling of 97698809 in words is "ninety-seven million, six hundred ninety-eight thousand, eight hundred nine".