98772140017 has 4 divisors (see below), whose sum is σ = 98772781540. Its totient is φ = 98771498496.

The previous prime is 98772139997. The next prime is 98772140021. The reversal of 98772140017 is 71004127789.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71004127789 = 7 ⋅10143446827.

It can be written as a sum of positive squares in 2 ways, for example, as 76480455601 + 22291684416 = 276551^2 + 149304^2 .

It is a 3-Lehmer number, since φ(98772140017) divides (98772140017-1)³.

It is a cyclic number.

It is not a de Polignac number, because 98772140017 - 2²⁷ = 98637922289 is a prime.

It is a deceptive number, since it divides R_98772140016.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98772140057) 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, 64153 + ... + 449065.

It is an arithmetic number, because the mean of its divisors is an integer number (24693195385).

It is a Poulet number, since it divides 2^98772140016-1.

Almost surely, 2^98772140017 is an apocalyptic number.

98772140017 is the 256609-th pentagonal number.

It is an amenable number.

98772140017 is a deficient number, since it is larger than the sum of its proper divisors (641523).

98772140017 is a wasteful number, since it uses less digits than its factorization.

98772140017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641522.

The product of its (nonzero) digits is 197568, while the sum is 46.

The spelling of 98772140017 in words is "ninety-eight billion, seven hundred seventy-two million, one hundred forty thousand, seventeen".