55545389 has 2 divisors, whose sum is σ = 55545390. Its totient is φ = 55545388.

The previous prime is 55545383. The next prime is 55545403. The reversal of 55545389 is 98354555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29789764 + 25755625 = 5458^2 + 5075^2 .

It is a cyclic number.

It is not a de Polignac number, because 55545389 - 2²⁴ = 38768173 is a prime.

It is a super-2 number, since 2×55545389² = 6170580478322642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55545383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27772694 + 27772695.

It is an arithmetic number, because the mean of its divisors is an integer number (27772695).

Almost surely, 2^55545389 is an apocalyptic number.

It is an amenable number.

55545389 is a deficient number, since it is larger than the sum of its proper divisors (1).

55545389 is an equidigital number, since it uses as much as digits as its factorization.

55545389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540000, while the sum is 44.

The square root of 55545389 is about 7452.8779005160. The cubic root of 55545389 is about 381.5481371626.

The spelling of 55545389 in words is "fifty-five million, five hundred forty-five thousand, three hundred eighty-nine".