2101372609 has 4 divisors (see below), whose sum is σ = 2401568704. Its totient is φ = 1801176516.

The previous prime is 2101372597. The next prime is 2101372619. The reversal of 2101372609 is 9062731012.

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.

It is a cyclic number.

It is not a de Polignac number, because 2101372609 - 2⁵ = 2101372577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101372619) 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, 150098037 + ... + 150098050.

It is an arithmetic number, because the mean of its divisors is an integer number (600392176).

Almost surely, 2^2101372609 is an apocalyptic number.

It is an amenable number.

2101372609 is a deficient number, since it is larger than the sum of its proper divisors (300196095).

2101372609 is an equidigital number, since it uses as much as digits as its factorization.

2101372609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300196094.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 2101372609 is about 45840.7308951330. The cubic root of 2101372609 is about 1280.8581096955.

The spelling of 2101372609 in words is "two billion, one hundred one million, three hundred seventy-two thousand, six hundred nine".