55068749 has 4 divisors (see below), whose sum is σ = 56107836. Its totient is φ = 54029664.

The previous prime is 55068737. The next prime is 55068779. The reversal of 55068749 is 94786055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38316100 + 16752649 = 6190^2 + 4093^2 .

It is a cyclic number.

It is not a de Polignac number, because 55068749 - 2⁴ = 55068733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55068779) 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, 519464 + ... + 519569.

It is an arithmetic number, because the mean of its divisors is an integer number (14026959).

Almost surely, 2^55068749 is an apocalyptic number.

It is an amenable number.

55068749 is a deficient number, since it is larger than the sum of its proper divisors (1039087).

55068749 is a wasteful number, since it uses less digits than its factorization.

55068749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039086.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 55068749 is about 7420.8320962005. The cubic root of 55068749 is about 380.4536341481.

The spelling of 55068749 in words is "fifty-five million, sixty-eight thousand, seven hundred forty-nine".