555619997 has 2 divisors, whose sum is σ = 555619998. Its totient is φ = 555619996.

The previous prime is 555619991. The next prime is 555620101. The reversal of 555619997 is 799916555.

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., 535737316 + 19882681 = 23146^2 + 4459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555619997 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 (555619991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277809998 + 277809999.

It is an arithmetic number, because the mean of its divisors is an integer number (277809999).

Almost surely, 2^555619997 is an apocalyptic number.

It is an amenable number.

555619997 is a deficient number, since it is larger than the sum of its proper divisors (1).

555619997 is an equidigital number, since it uses as much as digits as its factorization.

555619997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3827250, while the sum is 56.

The square root of 555619997 is about 23571.5930093831. The cubic root of 555619997 is about 822.1024754683.

The spelling of 555619997 in words is "five hundred fifty-five million, six hundred nineteen thousand, nine hundred ninety-seven".