2150780917 has 2 divisors, whose sum is σ = 2150780918. Its totient is φ = 2150780916.

The previous prime is 2150780893. The next prime is 2150780927. The reversal of 2150780917 is 7190870512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2083557316 + 67223601 = 45646^2 + 8199^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150780917 - 2¹⁹ = 2150256629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2150780917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2150780927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075390458 + 1075390459.

It is an arithmetic number, because the mean of its divisors is an integer number (1075390459).

Almost surely, 2^2150780917 is an apocalyptic number.

It is an amenable number.

2150780917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2150780917 is an equidigital number, since it uses as much as digits as its factorization.

2150780917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 2150780917 is about 46376.5125575436. The cubic root of 2150780917 is about 1290.8191254152.

The spelling of 2150780917 in words is "two billion, one hundred fifty million, seven hundred eighty thousand, nine hundred seventeen".