55057939 has 2 divisors, whose sum is σ = 55057940. Its totient is φ = 55057938.

The previous prime is 55057913. The next prime is 55057963. The reversal of 55057939 is 93975055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55057939 - 2⁵ = 55057907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55057895 and 55057904.

It is not a weakly prime, because it can be changed into another prime (55057909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27528969 + 27528970.

It is an arithmetic number, because the mean of its divisors is an integer number (27528970).

Almost surely, 2^55057939 is an apocalyptic number.

55057939 is a deficient number, since it is larger than the sum of its proper divisors (1).

55057939 is an equidigital number, since it uses as much as digits as its factorization.

55057939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 212625, while the sum is 43.

The square root of 55057939 is about 7420.1037054747. The cubic root of 55057939 is about 380.4287381590.

The spelling of 55057939 in words is "fifty-five million, fifty-seven thousand, nine hundred thirty-nine".