55249787 has 2 divisors, whose sum is σ = 55249788. Its totient is φ = 55249786.

The previous prime is 55249751. The next prime is 55249801. The reversal of 55249787 is 78794255.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55249787 - 2¹² = 55245691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55249087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27624893 + 27624894.

It is an arithmetic number, because the mean of its divisors is an integer number (27624894).

Almost surely, 2^55249787 is an apocalyptic number.

55249787 is a deficient number, since it is larger than the sum of its proper divisors (1).

55249787 is an equidigital number, since it uses as much as digits as its factorization.

55249787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 47.

The square root of 55249787 is about 7433.0200457149. The cubic root of 55249787 is about 380.8700907095.

The spelling of 55249787 in words is "fifty-five million, two hundred forty-nine thousand, seven hundred eighty-seven".