102100897 has 4 divisors (see below), whose sum is σ = 102322836. Its totient is φ = 101878960.

The previous prime is 102100879. The next prime is 102100907. The reversal of 102100897 is 798001201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798001201 = 18839 ⋅42359.

It can be written as a sum of positive squares in 2 ways, for example, as 11451456 + 90649441 = 3384^2 + 9521^2 .

It is a cyclic number.

It is not a de Polignac number, because 102100897 - 2¹¹ = 102098849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102100837) 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, 110278 + ... + 111199.

It is an arithmetic number, because the mean of its divisors is an integer number (25580709).

Almost surely, 2^102100897 is an apocalyptic number.

It is an amenable number.

102100897 is a deficient number, since it is larger than the sum of its proper divisors (221939).

102100897 is an equidigital number, since it uses as much as digits as its factorization.

102100897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221938.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 102100897 is about 10104.4988495224. The cubic root of 102100897 is about 467.3868821803.

The spelling of 102100897 in words is "one hundred two million, one hundred thousand, eight hundred ninety-seven".