55105979 has 2 divisors, whose sum is σ = 55105980. Its totient is φ = 55105978.

The previous prime is 55105969. The next prime is 55106033. The reversal of 55105979 is 97950155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55105979 - 2¹² = 55101883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55105969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27552989 + 27552990.

It is an arithmetic number, because the mean of its divisors is an integer number (27552990).

Almost surely, 2^55105979 is an apocalyptic number.

55105979 is a deficient number, since it is larger than the sum of its proper divisors (1).

55105979 is an equidigital number, since it uses as much as digits as its factorization.

55105979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70875, while the sum is 41.

The square root of 55105979 is about 7423.3401511718. The cubic root of 55105979 is about 380.5393518390.

The spelling of 55105979 in words is "fifty-five million, one hundred five thousand, nine hundred seventy-nine".