55129097 has 4 divisors (see below), whose sum is σ = 55192836. Its totient is φ = 55065360.

The previous prime is 55129093. The next prime is 55129103. The reversal of 55129097 is 79092155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50922496 + 4206601 = 7136^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 55129097 - 2² = 55129093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55129097.

It is not an unprimeable number, because it can be changed into a prime (55129093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30554 + ... + 32307.

It is an arithmetic number, because the mean of its divisors is an integer number (13798209).

Almost surely, 2^55129097 is an apocalyptic number.

It is an amenable number.

55129097 is a deficient number, since it is larger than the sum of its proper divisors (63739).

55129097 is an equidigital number, since it uses as much as digits as its factorization.

55129097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63738.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 55129097 is about 7424.8971036641. The cubic root of 55129097 is about 380.5925588833.

The spelling of 55129097 in words is "fifty-five million, one hundred twenty-nine thousand, ninety-seven".