55761977 has 2 divisors, whose sum is σ = 55761978. Its totient is φ = 55761976.

The previous prime is 55761967. The next prime is 55762001. The reversal of 55761977 is 77916755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54922921 + 839056 = 7411^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 55761977 - 2⁴ = 55761961 is a prime.

It is not a weakly prime, because it can be changed into another prime (55761907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27880988 + 27880989.

It is an arithmetic number, because the mean of its divisors is an integer number (27880989).

Almost surely, 2^55761977 is an apocalyptic number.

It is an amenable number.

55761977 is a deficient number, since it is larger than the sum of its proper divisors (1).

55761977 is an equidigital number, since it uses as much as digits as its factorization.

55761977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 463050, while the sum is 47.

The square root of 55761977 is about 7467.3942577046. The cubic root of 55761977 is about 382.0434172118.

The spelling of 55761977 in words is "fifty-five million, seven hundred sixty-one thousand, nine hundred seventy-seven".