97889447 has 4 divisors (see below), whose sum is σ = 97940136. Its totient is φ = 97838760.

The previous prime is 97889443. The next prime is 97889459. The reversal of 97889447 is 74498879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97889447 - 2² = 97889443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97889392 and 97889401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97889443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22328 + ... + 26349.

It is an arithmetic number, because the mean of its divisors is an integer number (24485034).

Almost surely, 2^97889447 is an apocalyptic number.

97889447 is a deficient number, since it is larger than the sum of its proper divisors (50689).

97889447 is a wasteful number, since it uses less digits than its factorization.

97889447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50688.

The product of its digits is 4064256, while the sum is 56.

The square root of 97889447 is about 9893.9095912587. The cubic root of 97889447 is about 460.8701974557.

The spelling of 97889447 in words is "ninety-seven million, eight hundred eighty-nine thousand, four hundred forty-seven".