55436489 has 2 divisors, whose sum is σ = 55436490. Its totient is φ = 55436488.

The previous prime is 55436477. The next prime is 55436497. The reversal of 55436489 is 98463455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55428025 + 8464 = 7445^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 55436489 - 2²⁴ = 38659273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55436089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27718244 + 27718245.

It is an arithmetic number, because the mean of its divisors is an integer number (27718245).

Almost surely, 2^55436489 is an apocalyptic number.

It is an amenable number.

55436489 is a deficient number, since it is larger than the sum of its proper divisors (1).

55436489 is an equidigital number, since it uses as much as digits as its factorization.

55436489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The square root of 55436489 is about 7445.5684134927. The cubic root of 55436489 is about 381.2986248471.

The spelling of 55436489 in words is "fifty-five million, four hundred thirty-six thousand, four hundred eighty-nine".