55987577 has 2 divisors, whose sum is σ = 55987578. Its totient is φ = 55987576.

The previous prime is 55987573. The next prime is 55987583. The reversal of 55987577 is 77578955.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55591936 + 395641 = 7456^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 55987577 - 2² = 55987573 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55987573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27993788 + 27993789.

It is an arithmetic number, because the mean of its divisors is an integer number (27993789).

Almost surely, 2^55987577 is an apocalyptic number.

It is an amenable number.

55987577 is a deficient number, since it is larger than the sum of its proper divisors (1).

55987577 is an equidigital number, since it uses as much as digits as its factorization.

55987577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3087000, while the sum is 53.

The square root of 55987577 is about 7482.4846809065. The cubic root of 55987577 is about 382.5579435764.

The spelling of 55987577 in words is "fifty-five million, nine hundred eighty-seven thousand, five hundred seventy-seven".