2126610917 has 4 divisors (see below), whose sum is σ = 2126726316. Its totient is φ = 2126495520.

The previous prime is 2126610911. The next prime is 2126610953. The reversal of 2126610917 is 7190166212.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 965096356 + 1161514561 = 31066^2 + 34081^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126610917 - 2¹⁸ = 2126348773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126610911) 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, 23168 + ... + 69209.

It is an arithmetic number, because the mean of its divisors is an integer number (531681579).

Almost surely, 2^2126610917 is an apocalyptic number.

It is an amenable number.

2126610917 is a deficient number, since it is larger than the sum of its proper divisors (115399).

2126610917 is an equidigital number, since it uses as much as digits as its factorization.

2126610917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115398.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2126610917 is about 46115.1918243869. The cubic root of 2126610917 is about 1285.9655855238.

The spelling of 2126610917 in words is "two billion, one hundred twenty-six million, six hundred ten thousand, nine hundred seventeen".