549723157 has 2 divisors, whose sum is σ = 549723158. Its totient is φ = 549723156.

The previous prime is 549723151. The next prime is 549723173. The reversal of 549723157 is 751327945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 521939716 + 27783441 = 22846^2 + 5271^2 .

It is a cyclic number.

It is not a de Polignac number, because 549723157 - 2³ = 549723149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549723151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274861578 + 274861579.

It is an arithmetic number, because the mean of its divisors is an integer number (274861579).

Almost surely, 2^549723157 is an apocalyptic number.

It is an amenable number.

549723157 is a deficient number, since it is larger than the sum of its proper divisors (1).

549723157 is an equidigital number, since it uses as much as digits as its factorization.

549723157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 43.

The square root of 549723157 is about 23446.1757436048. The cubic root of 549723157 is about 819.1837788271.

The spelling of 549723157 in words is "five hundred forty-nine million, seven hundred twenty-three thousand, one hundred fifty-seven".