54661909 has 2 divisors, whose sum is σ = 54661910. Its totient is φ = 54661908.

The previous prime is 54661903. The next prime is 54661949. The reversal of 54661909 is 90916645.

It is an a-pointer prime, because the next prime (54661949) can be obtained adding 54661909 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 14085009 = 6370^2 + 3753^2 .

It is a cyclic number.

It is not a de Polignac number, because 54661909 - 2¹¹ = 54659861 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 (54661903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27330954 + 27330955.

It is an arithmetic number, because the mean of its divisors is an integer number (27330955).

Almost surely, 2^54661909 is an apocalyptic number.

It is an amenable number.

54661909 is a deficient number, since it is larger than the sum of its proper divisors (1).

54661909 is an equidigital number, since it uses as much as digits as its factorization.

54661909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 54661909 is about 7393.3692590050. The cubic root of 54661909 is about 379.5144051242.

The spelling of 54661909 in words is "fifty-four million, six hundred sixty-one thousand, nine hundred nine".