55869641 has 2 divisors, whose sum is σ = 55869642. Its totient is φ = 55869640.

The previous prime is 55869629. The next prime is 55869643. The reversal of 55869641 is 14696855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 6869641 = 7000^2 + 2621^2 .

It is a cyclic number.

It is not a de Polignac number, because 55869641 - 2¹⁴ = 55853257 is a prime.

Together with 55869643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55869592 and 55869601.

It is not a weakly prime, because it can be changed into another prime (55869643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27934820 + 27934821.

It is an arithmetic number, because the mean of its divisors is an integer number (27934821).

Almost surely, 2^55869641 is an apocalyptic number.

It is an amenable number.

55869641 is a deficient number, since it is larger than the sum of its proper divisors (1).

55869641 is an equidigital number, since it uses as much as digits as its factorization.

55869641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 44.

The square root of 55869641 is about 7474.5997217242. The cubic root of 55869641 is about 382.2891394798.

The spelling of 55869641 in words is "fifty-five million, eight hundred sixty-nine thousand, six hundred forty-one".