55553689 has 2 divisors, whose sum is σ = 55553690. Its totient is φ = 55553688.

The previous prime is 55553683. The next prime is 55553741. The reversal of 55553689 is 98635555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54641664 + 912025 = 7392^2 + 955^2 .

It is a cyclic number.

It is not a de Polignac number, because 55553689 - 2³ = 55553681 is a prime.

It is not a weakly prime, because it can be changed into another prime (55553681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27776844 + 27776845.

It is an arithmetic number, because the mean of its divisors is an integer number (27776845).

Almost surely, 2^55553689 is an apocalyptic number.

It is an amenable number.

55553689 is a deficient number, since it is larger than the sum of its proper divisors (1).

55553689 is an equidigital number, since it uses as much as digits as its factorization.

55553689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810000, while the sum is 46.

The square root of 55553689 is about 7453.4347115944. The cubic root of 55553689 is about 381.5671407911.

The spelling of 55553689 in words is "fifty-five million, five hundred fifty-three thousand, six hundred eighty-nine".