47697867509 has 2 divisors, whose sum is σ = 47697867510. Its totient is φ = 47697867508.

The previous prime is 47697867493. The next prime is 47697867571. The reversal of 47697867509 is 90576879674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28620180625 + 19077686884 = 169175^2 + 138122^2 .

It is a cyclic number.

It is not a de Polignac number, because 47697867509 - 2⁴ = 47697867493 is a prime.

It is a super-2 number, since 2×47697867509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47697867709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23848933754 + 23848933755.

It is an arithmetic number, because the mean of its divisors is an integer number (23848933755).

Almost surely, 2^47697867509 is an apocalyptic number.

It is an amenable number.

47697867509 is a deficient number, since it is larger than the sum of its proper divisors (1).

47697867509 is an equidigital number, since it uses as much as digits as its factorization.

47697867509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160030080, while the sum is 68.

The spelling of 47697867509 in words is "forty-seven billion, six hundred ninety-seven million, eight hundred sixty-seven thousand, five hundred nine".