55943999 has 8 divisors (see below), whose sum is σ = 59145840. Its totient is φ = 52767936.

The previous prime is 55943983. The next prime is 55944011. The reversal of 55943999 is 99934955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55943999 - 2⁴ = 55943983 is a prime.

It is a super-2 number, since 2×55943999² = 6259462048224002, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 55943999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55943939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892 + ... + 10745.

It is an arithmetic number, because the mean of its divisors is an integer number (7393230).

Almost surely, 2^55943999 is an apocalyptic number.

55943999 is a deficient number, since it is larger than the sum of its proper divisors (3201841).

55943999 is a wasteful number, since it uses less digits than its factorization.

55943999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12889.

The product of its digits is 1968300, while the sum is 53.

The square root of 55943999 is about 7479.5721134300. The cubic root of 55943999 is about 382.4586629969.

The spelling of 55943999 in words is "fifty-five million, nine hundred forty-three thousand, nine hundred ninety-nine".