55609949 has 2 divisors, whose sum is σ = 55609950. Its totient is φ = 55609948.

The previous prime is 55609943. The next prime is 55609973. The reversal of 55609949 is 94990655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36990724 + 18619225 = 6082^2 + 4315^2 .

It is a cyclic number.

It is not a de Polignac number, because 55609949 - 2¹⁶ = 55544413 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 (55609943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27804974 + 27804975.

It is an arithmetic number, because the mean of its divisors is an integer number (27804975).

Almost surely, 2^55609949 is an apocalyptic number.

It is an amenable number.

55609949 is a deficient number, since it is larger than the sum of its proper divisors (1).

55609949 is an equidigital number, since it uses as much as digits as its factorization.

55609949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 47.

The square root of 55609949 is about 7457.2078554912. The cubic root of 55609949 is about 381.6959034660.

The spelling of 55609949 in words is "fifty-five million, six hundred nine thousand, nine hundred forty-nine".