7131909761 has 2 divisors, whose sum is σ = 7131909762. Its totient is φ = 7131909760.

The previous prime is 7131909737. The next prime is 7131909797. The reversal of 7131909761 is 1679091317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6663620161 + 468289600 = 81631^2 + 21640^2 .

It is a cyclic number.

It is not a de Polignac number, because 7131909761 - 2¹⁰ = 7131908737 is a prime.

It is a super-3 number, since 3×7131909761³ (a number of 31 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7131909461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3565954880 + 3565954881.

It is an arithmetic number, because the mean of its divisors is an integer number (3565954881).

Almost surely, 2^7131909761 is an apocalyptic number.

It is an amenable number.

7131909761 is a deficient number, since it is larger than the sum of its proper divisors (1).

7131909761 is an equidigital number, since it uses as much as digits as its factorization.

7131909761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 7131909761 is about 84450.6350538585. The cubic root of 7131909761 is about 1924.8724049683.

The spelling of 7131909761 in words is "seven billion, one hundred thirty-one million, nine hundred nine thousand, seven hundred sixty-one".