875772509 has 2 divisors, whose sum is σ = 875772510. Its totient is φ = 875772508.

The previous prime is 875772481. The next prime is 875772517. The reversal of 875772509 is 905277578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 843031225 + 32741284 = 29035^2 + 5722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-875772509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (875772539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437886254 + 437886255.

It is an arithmetic number, because the mean of its divisors is an integer number (437886255).

Almost surely, 2^875772509 is an apocalyptic number.

It is an amenable number.

875772509 is a deficient number, since it is larger than the sum of its proper divisors (1).

875772509 is an equidigital number, since it uses as much as digits as its factorization.

875772509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1234800, while the sum is 50.

The square root of 875772509 is about 29593.4538200596. The cubic root of 875772509 is about 956.7469860301.

The spelling of 875772509 in words is "eight hundred seventy-five million, seven hundred seventy-two thousand, five hundred nine".