55994999 has 4 divisors (see below), whose sum is σ = 56044800. Its totient is φ = 55945200.

The previous prime is 55994993. The next prime is 55995019. The reversal of 55994999 is 99949955.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55994999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55994993) 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, 23174 + ... + 25475.

It is an arithmetic number, because the mean of its divisors is an integer number (14011200).

Almost surely, 2^55994999 is an apocalyptic number.

55994999 is a deficient number, since it is larger than the sum of its proper divisors (49801).

55994999 is a wasteful number, since it uses less digits than its factorization.

55994999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49800.

The product of its digits is 5904900, while the sum is 59.

The square root of 55994999 is about 7482.9806227198. The cubic root of 55994999 is about 382.5748474430.

The spelling of 55994999 in words is "fifty-five million, nine hundred ninety-four thousand, nine hundred ninety-nine".