55434139 has 2 divisors, whose sum is σ = 55434140. Its totient is φ = 55434138.

The previous prime is 55434133. The next prime is 55434143. The reversal of 55434139 is 93143455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55434139 - 2¹³ = 55425947 is a prime.

It is not a weakly prime, because it can be changed into another prime (55434133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27717069 + 27717070.

It is an arithmetic number, because the mean of its divisors is an integer number (27717070).

Almost surely, 2^55434139 is an apocalyptic number.

55434139 is a deficient number, since it is larger than the sum of its proper divisors (1).

55434139 is an equidigital number, since it uses as much as digits as its factorization.

55434139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 34.

The square root of 55434139 is about 7445.4105998259. The cubic root of 55434139 is about 381.2932369131.

The spelling of 55434139 in words is "fifty-five million, four hundred thirty-four thousand, one hundred thirty-nine".