55996687 has 2 divisors, whose sum is σ = 55996688. Its totient is φ = 55996686.

The previous prime is 55996649. The next prime is 55996711. The reversal of 55996687 is 78669955.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55996687 - 2¹⁹ = 55472399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55996607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27998343 + 27998344.

It is an arithmetic number, because the mean of its divisors is an integer number (27998344).

Almost surely, 2^55996687 is an apocalyptic number.

55996687 is a deficient number, since it is larger than the sum of its proper divisors (1).

55996687 is an equidigital number, since it uses as much as digits as its factorization.

55996687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 55.

The square root of 55996687 is about 7483.0934111502. The cubic root of 55996687 is about 382.5786917140.

The spelling of 55996687 in words is "fifty-five million, nine hundred ninety-six thousand, six hundred eighty-seven".