55768087 has 2 divisors, whose sum is σ = 55768088. Its totient is φ = 55768086.

The previous prime is 55768057. The next prime is 55768093. The reversal of 55768087 is 78086755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55768087 is a prime.

It is a super-2 number, since 2×55768087² = 6220159055279138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55768057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27884043 + 27884044.

It is an arithmetic number, because the mean of its divisors is an integer number (27884044).

Almost surely, 2^55768087 is an apocalyptic number.

55768087 is a deficient number, since it is larger than the sum of its proper divisors (1).

55768087 is an equidigital number, since it uses as much as digits as its factorization.

55768087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 55768087 is about 7467.8033584181. The cubic root of 55768087 is about 382.0573705671.

It can be divided in two parts, 557 and 68087, that added together give a square (68644 = 262²).

The spelling of 55768087 in words is "fifty-five million, seven hundred sixty-eight thousand, eighty-seven".