2120917659 has 16 divisors (see below), whose sum is σ = 3310702080. Its totient is φ = 1182392640.

The previous prime is 2120917649. The next prime is 2120917709. The reversal of 2120917659 is 9567190212.

It is not a de Polignac number, because 2120917659 - 2⁵ = 2120917627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120917659.

It is not an unprimeable number, because it can be changed into a prime (2120917619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230799 + ... + 1232520.

It is an arithmetic number, because the mean of its divisors is an integer number (206918880).

Almost surely, 2^2120917659 is an apocalyptic number.

2120917659 is a deficient number, since it is larger than the sum of its proper divisors (1189784421).

2120917659 is a wasteful number, since it uses less digits than its factorization.

2120917659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463370.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 2120917659 is about 46053.4217946940. The cubic root of 2120917659 is about 1284.8169853463.

The spelling of 2120917659 in words is "two billion, one hundred twenty million, nine hundred seventeen thousand, six hundred fifty-nine".