5506021397 has 2 divisors, whose sum is σ = 5506021398. Its totient is φ = 5506021396.

The previous prime is 5506021337. The next prime is 5506021399. The reversal of 5506021397 is 7931206055.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4109579236 + 1396442161 = 64106^2 + 37369^2 .

It is a cyclic number.

It is not a de Polignac number, because 5506021397 - 2¹⁸ = 5505759253 is a prime.

Together with 5506021399, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5506021397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5506021399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2753010698 + 2753010699.

It is an arithmetic number, because the mean of its divisors is an integer number (2753010699).

Almost surely, 2^5506021397 is an apocalyptic number.

It is an amenable number.

5506021397 is a deficient number, since it is larger than the sum of its proper divisors (1).

5506021397 is an equidigital number, since it uses as much as digits as its factorization.

5506021397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 5506021397 is about 74202.5700161389. The cubic root of 5506021397 is about 1765.8181032987.

The spelling of 5506021397 in words is "five billion, five hundred six million, twenty-one thousand, three hundred ninety-seven".