55808039 has 4 divisors (see below), whose sum is σ = 63780624. Its totient is φ = 47835456.

The previous prime is 55808033. The next prime is 55808047. The reversal of 55808039 is 93080855.

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

It is a cyclic number.

It is not a de Polignac number, because 55808039 - 2⁸ = 55807783 is a prime.

It is a super-2 number, since 2×55808039² = 6229074434051042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55807993 and 55808011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55808033) 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, 3986282 + ... + 3986295.

It is an arithmetic number, because the mean of its divisors is an integer number (15945156).

Almost surely, 2^55808039 is an apocalyptic number.

55808039 is a deficient number, since it is larger than the sum of its proper divisors (7972585).

55808039 is an equidigital number, since it uses as much as digits as its factorization.

55808039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7972584.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 55808039 is about 7470.4778294297. The cubic root of 55808039 is about 382.1485835010.

The spelling of 55808039 in words is "fifty-five million, eight hundred eight thousand, thirty-nine".