55877387 has 2 divisors, whose sum is σ = 55877388. Its totient is φ = 55877386.

The previous prime is 55877321. The next prime is 55877389. The reversal of 55877387 is 78377855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55877387 - 2²⁰ = 54828811 is a prime.

Together with 55877389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55877389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27938693 + 27938694.

It is an arithmetic number, because the mean of its divisors is an integer number (27938694).

Almost surely, 2^55877387 is an apocalyptic number.

55877387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55877387 is an equidigital number, since it uses as much as digits as its factorization.

55877387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1646400, while the sum is 50.

The square root of 55877387 is about 7475.1178586026. The cubic root of 55877387 is about 382.3068060502.

The spelling of 55877387 in words is "fifty-five million, eight hundred seventy-seven thousand, three hundred eighty-seven".