8140104257 has 2 divisors, whose sum is σ = 8140104258. Its totient is φ = 8140104256.

The previous prime is 8140104233. The next prime is 8140104263. The reversal of 8140104257 is 7524010418.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6272481601 + 1867622656 = 79199^2 + 43216^2 .

It is a cyclic number.

It is not a de Polignac number, because 8140104257 - 2⁸ = 8140104001 is a prime.

It is a super-2 number, since 2×8140104257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8140104227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4070052128 + 4070052129.

It is an arithmetic number, because the mean of its divisors is an integer number (4070052129).

Almost surely, 2^8140104257 is an apocalyptic number.

It is an amenable number.

8140104257 is a deficient number, since it is larger than the sum of its proper divisors (1).

8140104257 is an equidigital number, since it uses as much as digits as its factorization.

8140104257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 8140104257 is about 90222.5263279631. The cubic root of 8140104257 is about 2011.6078532821.

The spelling of 8140104257 in words is "eight billion, one hundred forty million, one hundred four thousand, two hundred fifty-seven".