2120472517 has 2 divisors, whose sum is σ = 2120472518. Its totient is φ = 2120472516.

The previous prime is 2120472499. The next prime is 2120472521. The reversal of 2120472517 is 7152740212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1734389316 + 386083201 = 41646^2 + 19649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120472517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120472017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060236258 + 1060236259.

It is an arithmetic number, because the mean of its divisors is an integer number (1060236259).

Almost surely, 2^2120472517 is an apocalyptic number.

It is an amenable number.

2120472517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120472517 is an equidigital number, since it uses as much as digits as its factorization.

2120472517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2120472517 is about 46048.5886537253. The cubic root of 2120472517 is about 1284.7270924931.

The spelling of 2120472517 in words is "two billion, one hundred twenty million, four hundred seventy-two thousand, five hundred seventeen".