55794209 has 4 divisors (see below), whose sum is σ = 56201604. Its totient is φ = 55386816.

The previous prime is 55794191. The next prime is 55794223. The reversal of 55794209 is 90249755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90249755 = 5 ⋅18049951.

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 27331984 = 5335^2 + 5228^2 .

It is a cyclic number.

It is not a de Polignac number, because 55794209 - 2⁸ = 55793953 is a prime.

It is a super-2 number, since 2×55794209² = 6225987515871362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55794229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203492 + ... + 203765.

It is an arithmetic number, because the mean of its divisors is an integer number (14050401).

Almost surely, 2^55794209 is an apocalyptic number.

It is an amenable number.

55794209 is a deficient number, since it is larger than the sum of its proper divisors (407395).

55794209 is a wasteful number, since it uses less digits than its factorization.

55794209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407394.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 55794209 is about 7469.5521284746. The cubic root of 55794209 is about 382.1170136672.

The spelling of 55794209 in words is "fifty-five million, seven hundred ninety-four thousand, two hundred nine".