55396129 has 2 divisors, whose sum is σ = 55396130. Its totient is φ = 55396128.

The previous prime is 55396097. The next prime is 55396171. The reversal of 55396129 is 92169355.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49280400 + 6115729 = 7020^2 + 2473^2 .

It is a cyclic number.

It is not a de Polignac number, because 55396129 - 2⁵ = 55396097 is a prime.

It is a super-2 number, since 2×55396129² = 6137462216369282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55396091 and 55396100.

It is not a weakly prime, because it can be changed into another prime (55396729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27698064 + 27698065.

It is an arithmetic number, because the mean of its divisors is an integer number (27698065).

Almost surely, 2^55396129 is an apocalyptic number.

It is an amenable number.

55396129 is a deficient number, since it is larger than the sum of its proper divisors (1).

55396129 is an equidigital number, since it uses as much as digits as its factorization.

55396129 is an evil number, because the sum of its binary digits is even.

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

The square root of 55396129 is about 7442.8575829449. The cubic root of 55396129 is about 381.2060687891.

The spelling of 55396129 in words is "fifty-five million, three hundred ninety-six thousand, one hundred twenty-nine".