7738728197 has 2 divisors, whose sum is σ = 7738728198. Its totient is φ = 7738728196.

The previous prime is 7738728163. The next prime is 7738728211. The reversal of 7738728197 is 7918278377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7604886436 + 133841761 = 87206^2 + 11569^2 .

It is a cyclic number.

It is not a de Polignac number, because 7738728197 - 2⁶ = 7738728133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7738728157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3869364098 + 3869364099.

It is an arithmetic number, because the mean of its divisors is an integer number (3869364099).

Almost surely, 2^7738728197 is an apocalyptic number.

It is an amenable number.

7738728197 is a deficient number, since it is larger than the sum of its proper divisors (1).

7738728197 is an equidigital number, since it uses as much as digits as its factorization.

7738728197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8297856, while the sum is 59.

The square root of 7738728197 is about 87970.0414743565. The cubic root of 7738728197 is about 1977.9859291288.

The spelling of 7738728197 in words is "seven billion, seven hundred thirty-eight million, seven hundred twenty-eight thousand, one hundred ninety-seven".