100898507209 has 4 divisors (see below), whose sum is σ = 100957548420. Its totient is φ = 100839466000.

The previous prime is 100898507179. The next prime is 100898507243. The reversal of 100898507209 is 902705898001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902705898001 = 4019 ⋅224609579.

It can be written as a sum of positive squares in 2 ways, for example, as 20967908809 + 79930598400 = 144803^2 + 282720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100898507209 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 (100898507299) 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, 29518042 + ... + 29521459.

It is an arithmetic number, because the mean of its divisors is an integer number (25239387105).

Almost surely, 2^100898507209 is an apocalyptic number.

It is an amenable number.

100898507209 is a deficient number, since it is larger than the sum of its proper divisors (59041211).

100898507209 is an equidigital number, since it uses as much as digits as its factorization.

100898507209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59041210.

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 100898507209 in words is "one hundred billion, eight hundred ninety-eight million, five hundred seven thousand, two hundred nine".