54947149 has 2 divisors, whose sum is σ = 54947150. Its totient is φ = 54947148.

The previous prime is 54947129. The next prime is 54947171. The reversal of 54947149 is 94174945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40832100 + 14115049 = 6390^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 54947149 - 2¹¹ = 54945101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54947129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27473574 + 27473575.

It is an arithmetic number, because the mean of its divisors is an integer number (27473575).

Almost surely, 2^54947149 is an apocalyptic number.

It is an amenable number.

54947149 is a deficient number, since it is larger than the sum of its proper divisors (1).

54947149 is an equidigital number, since it uses as much as digits as its factorization.

54947149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 54947149 is about 7412.6344169937. The cubic root of 54947149 is about 380.1733950132.

The spelling of 54947149 in words is "fifty-four million, nine hundred forty-seven thousand, one hundred forty-nine".