8109503957 has 2 divisors, whose sum is σ = 8109503958. Its totient is φ = 8109503956.

The previous prime is 8109503933. The next prime is 8109504023. The reversal of 8109503957 is 7593059018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7431474436 + 678029521 = 86206^2 + 26039^2 .

It is a cyclic number.

It is not a de Polignac number, because 8109503957 - 2¹² = 8109499861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8109503917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4054751978 + 4054751979.

It is an arithmetic number, because the mean of its divisors is an integer number (4054751979).

Almost surely, 2^8109503957 is an apocalyptic number.

It is an amenable number.

8109503957 is a deficient number, since it is larger than the sum of its proper divisors (1).

8109503957 is an equidigital number, since it uses as much as digits as its factorization.

8109503957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 8109503957 is about 90052.7842823308. The cubic root of 8109503957 is about 2009.0840076851.

The spelling of 8109503957 in words is "eight billion, one hundred nine million, five hundred three thousand, nine hundred fifty-seven".