97189989 has 8 divisors (see below), whose sum is σ = 139554912. Its totient is φ = 59809200.

The previous prime is 97189957. The next prime is 97190021. The reversal of 97189989 is 98998179.

It is an interprime number because it is at equal distance from previous prime (97189957) and next prime (97190021).

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

It is not a de Polignac number, because 97189989 - 2⁵ = 97189957 is a prime.

It is a super-3 number, since 3×97189989³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97189909) by changing a digit.

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, 1245987 + ... + 1246064.

It is an arithmetic number, because the mean of its divisors is an integer number (17444364).

Almost surely, 2^97189989 is an apocalyptic number.

It is an amenable number.

97189989 is a deficient number, since it is larger than the sum of its proper divisors (42364923).

97189989 is a wasteful number, since it uses less digits than its factorization.

97189989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492067.

The product of its digits is 2939328, while the sum is 60.

The square root of 97189989 is about 9858.4983136378. The cubic root of 97189989 is about 459.7698738659.

The spelling of 97189989 in words is "ninety-seven million, one hundred eighty-nine thousand, nine hundred eighty-nine".