97916489 has 4 divisors (see below), whose sum is σ = 106818000. Its totient is φ = 89014980.

The previous prime is 97916479. The next prime is 97916491. The reversal of 97916489 is 98461979.

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.

It is a cyclic number.

It is not a de Polignac number, because 97916489 - 2²⁰ = 96867913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97916489.

It is not an unprimeable number, because it can be changed into a prime (97916419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4450739 + ... + 4450760.

It is an arithmetic number, because the mean of its divisors is an integer number (26704500).

Almost surely, 2^97916489 is an apocalyptic number.

It is an amenable number.

97916489 is a deficient number, since it is larger than the sum of its proper divisors (8901511).

97916489 is a wasteful number, since it uses less digits than its factorization.

97916489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8901510.

The product of its digits is 979776, while the sum is 53.

The square root of 97916489 is about 9895.2760951880. The cubic root of 97916489 is about 460.9126320756.

Subtracting 97916489 from its reverse (98461979), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 97916489 in words is "ninety-seven million, nine hundred sixteen thousand, four hundred eighty-nine".