549984157 has 2 divisors, whose sum is σ = 549984158. Its totient is φ = 549984156.

The previous prime is 549984137. The next prime is 549984163. The reversal of 549984157 is 751489945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383728921 + 166255236 = 19589^2 + 12894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549984157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549984137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274992078 + 274992079.

It is an arithmetic number, because the mean of its divisors is an integer number (274992079).

Almost surely, 2^549984157 is an apocalyptic number.

It is an amenable number.

549984157 is a deficient number, since it is larger than the sum of its proper divisors (1).

549984157 is an equidigital number, since it uses as much as digits as its factorization.

549984157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 52.

The square root of 549984157 is about 23451.7410227898. The cubic root of 549984157 is about 819.3134035512.

The spelling of 549984157 in words is "five hundred forty-nine million, nine hundred eighty-four thousand, one hundred fifty-seven".