5275721909 has 2 divisors, whose sum is σ = 5275721910. Its totient is φ = 5275721908.

The previous prime is 5275721897. The next prime is 5275721929. The reversal of 5275721909 is 9091275725.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2995372900 + 2280349009 = 54730^2 + 47753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5275721909 is a prime.

It is a super-2 number, since 2×5275721909² = 55666483322205208562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5275721929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2637860954 + 2637860955.

It is an arithmetic number, because the mean of its divisors is an integer number (2637860955).

Almost surely, 2^5275721909 is an apocalyptic number.

It is an amenable number.

5275721909 is a deficient number, since it is larger than the sum of its proper divisors (1).

5275721909 is an equidigital number, since it uses as much as digits as its factorization.

5275721909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 396900, while the sum is 47.

The square root of 5275721909 is about 72634.1648881571. The cubic root of 5275721909 is about 1740.8471135017.

The spelling of 5275721909 in words is "five billion, two hundred seventy-five million, seven hundred twenty-one thousand, nine hundred nine".