55129039 has 8 divisors (see below), whose sum is σ = 63583520. Its totient is φ = 46819296.

The previous prime is 55129033. The next prime is 55129057. The reversal of 55129039 is 93092155.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55129039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55128995 and 55129013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55129033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35364 + ... + 36889.

It is an arithmetic number, because the mean of its divisors is an integer number (7947940).

Almost surely, 2^55129039 is an apocalyptic number.

55129039 is a deficient number, since it is larger than the sum of its proper divisors (8454481).

55129039 is a wasteful number, since it uses less digits than its factorization.

55129039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72369.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 55129039 is about 7424.8931978851. The cubic root of 55129039 is about 380.5924254125.

The spelling of 55129039 in words is "fifty-five million, one hundred twenty-nine thousand, thirty-nine".