318103475749 has 2 divisors, whose sum is σ = 318103475750. Its totient is φ = 318103475748.

The previous prime is 318103475713. The next prime is 318103475779. The reversal of 318103475749 is 947574301813.

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., 165277210849 + 152826264900 = 406543^2 + 390930^2 .

It is a cyclic number.

It is not a de Polignac number, because 318103475749 - 2¹³ = 318103467557 is a prime.

It is a super-2 number, since 2×318103475749² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 318103475696 and 318103475705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318103475779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159051737874 + 159051737875.

It is an arithmetic number, because the mean of its divisors is an integer number (159051737875).

Almost surely, 2^318103475749 is an apocalyptic number.

It is an amenable number.

318103475749 is a deficient number, since it is larger than the sum of its proper divisors (1).

318103475749 is an equidigital number, since it uses as much as digits as its factorization.

318103475749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 318103475749 in words is "three hundred eighteen billion, one hundred three million, four hundred seventy-five thousand, seven hundred forty-nine".