98766509 has 4 divisors (see below), whose sum is σ = 100240704. Its totient is φ = 97292316.

The previous prime is 98766461. The next prime is 98766523. The reversal of 98766509 is 90566789.

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: 90566789 = 181 ⋅500369.

It is a cyclic number.

It is not a de Polignac number, because 98766509 - 2²⁰ = 97717933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98766529) 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, 736997 + ... + 737130.

It is an arithmetic number, because the mean of its divisors is an integer number (25060176).

Almost surely, 2^98766509 is an apocalyptic number.

It is an amenable number.

98766509 is a deficient number, since it is larger than the sum of its proper divisors (1474195).

98766509 is a wasteful number, since it uses less digits than its factorization.

98766509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474194.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 98766509 is about 9938.1340803996. The cubic root of 98766509 is about 462.2425295946.

The spelling of 98766509 in words is "ninety-eight million, seven hundred sixty-six thousand, five hundred nine".