55977767 has 2 divisors, whose sum is σ = 55977768. Its totient is φ = 55977766.

The previous prime is 55977739. The next prime is 55977829. The reversal of 55977767 is 76777955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55977767 - 2¹⁰ = 55976743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55977737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27988883 + 27988884.

It is an arithmetic number, because the mean of its divisors is an integer number (27988884).

Almost surely, 2^55977767 is an apocalyptic number.

55977767 is a deficient number, since it is larger than the sum of its proper divisors (1).

55977767 is an equidigital number, since it uses as much as digits as its factorization.

55977767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3241350, while the sum is 53.

The square root of 55977767 is about 7481.8291212778. The cubic root of 55977767 is about 382.5355986632.

The spelling of 55977767 in words is "fifty-five million, nine hundred seventy-seven thousand, seven hundred sixty-seven".