55489619 has 2 divisors, whose sum is σ = 55489620. Its totient is φ = 55489618.

The previous prime is 55489613. The next prime is 55489627. The reversal of 55489619 is 91698455.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55489619 - 2²⁰ = 54441043 is a prime.

It is a super-2 number, since 2×55489619² = 6158195633530322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55489613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27744809 + 27744810.

It is an arithmetic number, because the mean of its divisors is an integer number (27744810).

Almost surely, 2^55489619 is an apocalyptic number.

55489619 is a deficient number, since it is larger than the sum of its proper divisors (1).

55489619 is an equidigital number, since it uses as much as digits as its factorization.

55489619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 47.

The square root of 55489619 is about 7449.1354531919. The cubic root of 55489619 is about 381.4203973950.

The spelling of 55489619 in words is "fifty-five million, four hundred eighty-nine thousand, six hundred nineteen".