97824989 has 4 divisors (see below), whose sum is σ = 99063360. Its totient is φ = 96586620.

The previous prime is 97824959. The next prime is 97824997. The reversal of 97824989 is 98942879.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98942879 = 7 ⋅14134697.

It is a cyclic number.

It is not a de Polignac number, because 97824989 - 2²⁴ = 81047773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97824959) 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, 619067 + ... + 619224.

It is an arithmetic number, because the mean of its divisors is an integer number (24765840).

Almost surely, 2^97824989 is an apocalyptic number.

It is an amenable number.

97824989 is a deficient number, since it is larger than the sum of its proper divisors (1238371).

97824989 is a wasteful number, since it uses less digits than its factorization.

97824989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238370.

The product of its digits is 2612736, while the sum is 56.

The square root of 97824989 is about 9890.6515963307. The cubic root of 97824989 is about 460.7690176898.

The spelling of 97824989 in words is "ninety-seven million, eight hundred twenty-four thousand, nine hundred eighty-nine".