55489949 has 2 divisors, whose sum is σ = 55489950. Its totient is φ = 55489948.

The previous prime is 55489919. The next prime is 55489991. The reversal of 55489949 is 94998455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34164025 + 21325924 = 5845^2 + 4618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55489949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55489949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55489919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27744974 + 27744975.

It is an arithmetic number, because the mean of its divisors is an integer number (27744975).

Almost surely, 2^55489949 is an apocalyptic number.

It is an amenable number.

55489949 is a deficient number, since it is larger than the sum of its proper divisors (1).

55489949 is an equidigital number, since it uses as much as digits as its factorization.

55489949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 53.

The square root of 55489949 is about 7449.1576033804. The cubic root of 55489949 is about 381.4211535033.

The spelling of 55489949 in words is "fifty-five million, four hundred eighty-nine thousand, nine hundred forty-nine".