55360997 has 2 divisors, whose sum is σ = 55360998. Its totient is φ = 55360996.

The previous prime is 55360969. The next prime is 55360999. The reversal of 55360997 is 79906355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32330596 + 23030401 = 5686^2 + 4799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55360997 is a prime.

Together with 55360999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55360999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27680498 + 27680499.

It is an arithmetic number, because the mean of its divisors is an integer number (27680499).

Almost surely, 2^55360997 is an apocalyptic number.

It is an amenable number.

55360997 is a deficient number, since it is larger than the sum of its proper divisors (1).

55360997 is an equidigital number, since it uses as much as digits as its factorization.

55360997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 255150, while the sum is 44.

The square root of 55360997 is about 7440.4970936087. The cubic root of 55360997 is about 381.1254653005.

The spelling of 55360997 in words is "fifty-five million, three hundred sixty thousand, nine hundred ninety-seven".