55091879 has 2 divisors, whose sum is σ = 55091880. Its totient is φ = 55091878.

The previous prime is 55091873. The next prime is 55091903. The reversal of 55091879 is 97819055.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55091879 - 2²⁴ = 38314663 is a prime.

It is a super-3 number, since 3×55091879³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55091873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27545939 + 27545940.

It is an arithmetic number, because the mean of its divisors is an integer number (27545940).

Almost surely, 2^55091879 is an apocalyptic number.

55091879 is a deficient number, since it is larger than the sum of its proper divisors (1).

55091879 is an equidigital number, since it uses as much as digits as its factorization.

55091879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 55091879 is about 7422.3903831582. The cubic root of 55091879 is about 380.5068927927.

It can be divided in two parts, 550 and 91879, that added together give a palindrome (92429).

The spelling of 55091879 in words is "fifty-five million, ninety-one thousand, eight hundred seventy-nine".