55680839 has 2 divisors, whose sum is σ = 55680840. Its totient is φ = 55680838.

The previous prime is 55680817. The next prime is 55680857. The reversal of 55680839 is 93808655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55680839 - 2¹² = 55676743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55680839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55680809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27840419 + 27840420.

It is an arithmetic number, because the mean of its divisors is an integer number (27840420).

Almost surely, 2^55680839 is an apocalyptic number.

55680839 is a deficient number, since it is larger than the sum of its proper divisors (1).

55680839 is an equidigital number, since it uses as much as digits as its factorization.

55680839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 55680839 is about 7461.9594611603. The cubic root of 55680839 is about 381.8580263322.

The spelling of 55680839 in words is "fifty-five million, six hundred eighty thousand, eight hundred thirty-nine".