55671949 has 2 divisors, whose sum is σ = 55671950. Its totient is φ = 55671948.

The previous prime is 55671947. The next prime is 55672007. The reversal of 55671949 is 94917655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51337225 + 4334724 = 7165^2 + 2082^2 .

It is a cyclic number.

It is not a de Polignac number, because 55671949 - 2¹ = 55671947 is a prime.

Together with 55671947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 55671899 and 55671908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55671947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27835974 + 27835975.

It is an arithmetic number, because the mean of its divisors is an integer number (27835975).

Almost surely, 2^55671949 is an apocalyptic number.

It is an amenable number.

55671949 is a deficient number, since it is larger than the sum of its proper divisors (1).

55671949 is an equidigital number, since it uses as much as digits as its factorization.

55671949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 46.

The square root of 55671949 is about 7461.3637493423. The cubic root of 55671949 is about 381.8377027726.

The spelling of 55671949 in words is "fifty-five million, six hundred seventy-one thousand, nine hundred forty-nine".