55803949 has 4 divisors (see below), whose sum is σ = 55841436. Its totient is φ = 55766464.

The previous prime is 55803947. The next prime is 55803961. The reversal of 55803949 is 94930855.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94930855 = 5 ⋅18986171.

It can be written as a sum of positive squares in 2 ways, for example, as 21206025 + 34597924 = 4605^2 + 5882^2 .

It is a cyclic number.

It is not a de Polignac number, because 55803949 - 2¹ = 55803947 is a prime.

It is a super-3 number, since 3×55803949³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55803947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16414 + ... + 19519.

It is an arithmetic number, because the mean of its divisors is an integer number (13960359).

Almost surely, 2^55803949 is an apocalyptic number.

It is an amenable number.

55803949 is a deficient number, since it is larger than the sum of its proper divisors (37487).

55803949 is a wasteful number, since it uses less digits than its factorization.

55803949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37486.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 55803949 is about 7470.2040802109. The cubic root of 55803949 is about 382.1392477738.

The spelling of 55803949 in words is "fifty-five million, eight hundred three thousand, nine hundred forty-nine".