55639129 has 8 divisors (see below), whose sum is σ = 68479040. Its totient is φ = 44022096.

The previous prime is 55639127. The next prime is 55639217. The reversal of 55639129 is 92193655.

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 not a de Polignac number, because 55639129 - 2¹ = 55639127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55639091 and 55639100.

It is not an unprimeable number, because it can be changed into a prime (55639127) 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, 305619 + ... + 305800.

It is an arithmetic number, because the mean of its divisors is an integer number (8559880).

Almost surely, 2^55639129 is an apocalyptic number.

It is an amenable number.

55639129 is a deficient number, since it is larger than the sum of its proper divisors (12839911).

55639129 is a wasteful number, since it uses less digits than its factorization.

55639129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611439.

The product of its digits is 72900, while the sum is 40.

The square root of 55639129 is about 7459.1640952589. The cubic root of 55639129 is about 381.7626537455.

The spelling of 55639129 in words is "fifty-five million, six hundred thirty-nine thousand, one hundred twenty-nine".