54565997 has 2 divisors, whose sum is σ = 54565998. Its totient is φ = 54565996.

The previous prime is 54565993. The next prime is 54566021. The reversal of 54565997 is 79956545.

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., 41396356 + 13169641 = 6434^2 + 3629^2 .

It is a cyclic number.

It is not a de Polignac number, because 54565997 - 2² = 54565993 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 (54565993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27282998 + 27282999.

It is an arithmetic number, because the mean of its divisors is an integer number (27282999).

Almost surely, 2^54565997 is an apocalyptic number.

It is an amenable number.

54565997 is a deficient number, since it is larger than the sum of its proper divisors (1).

54565997 is an equidigital number, since it uses as much as digits as its factorization.

54565997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1701000, while the sum is 50.

The square root of 54565997 is about 7386.8800585904. The cubic root of 54565997 is about 379.2923047213.

The spelling of 54565997 in words is "fifty-four million, five hundred sixty-five thousand, nine hundred ninety-seven".