5721669997 has 2 divisors, whose sum is σ = 5721669998. Its totient is φ = 5721669996.

The previous prime is 5721669979. The next prime is 5721670021. The reversal of 5721669997 is 7999661275.

Together with previous prime (5721669979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5115968676 + 605701321 = 71526^2 + 24611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5721669997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5721669977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2860834998 + 2860834999.

It is an arithmetic number, because the mean of its divisors is an integer number (2860834999).

Almost surely, 2^5721669997 is an apocalyptic number.

It is an amenable number.

5721669997 is a deficient number, since it is larger than the sum of its proper divisors (1).

5721669997 is an equidigital number, since it uses as much as digits as its factorization.

5721669997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12859560, while the sum is 61.

The square root of 5721669997 is about 75641.7212720599. The cubic root of 5721669997 is about 1788.5768362943.

The spelling of 5721669997 in words is "five billion, seven hundred twenty-one million, six hundred sixty-nine thousand, nine hundred ninety-seven".