98780971 has 4 divisors (see below), whose sum is σ = 99333000. Its totient is φ = 98228944.

The previous prime is 98780963. The next prime is 98780987. The reversal of 98780971 is 17908789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17908789 = 23 ⋅778643.

It is a cyclic number.

It is not a de Polignac number, because 98780971 - 2³ = 98780963 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98780371) 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, 275746 + ... + 276103.

It is an arithmetic number, because the mean of its divisors is an integer number (24833250).

Almost surely, 2^98780971 is an apocalyptic number.

98780971 is a deficient number, since it is larger than the sum of its proper divisors (552029).

98780971 is a wasteful number, since it uses less digits than its factorization.

98780971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552028.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 98780971 is about 9938.8616551394. The cubic root of 98780971 is about 462.2650899587.

The spelling of 98780971 in words is "ninety-eight million, seven hundred eighty thousand, nine hundred seventy-one".