315819234749 has 2 divisors, whose sum is σ = 315819234750. Its totient is φ = 315819234748.

The previous prime is 315819234623. The next prime is 315819234763. The reversal of 315819234749 is 947432918513.

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., 173758086649 + 142061148100 = 416843^2 + 376910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315819234749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 315819234694 and 315819234703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315819234349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157909617374 + 157909617375.

It is an arithmetic number, because the mean of its divisors is an integer number (157909617375).

Almost surely, 2^315819234749 is an apocalyptic number.

It is an amenable number.

315819234749 is a deficient number, since it is larger than the sum of its proper divisors (1).

315819234749 is an equidigital number, since it uses as much as digits as its factorization.

315819234749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The spelling of 315819234749 in words is "three hundred fifteen billion, eight hundred nineteen million, two hundred thirty-four thousand, seven hundred forty-nine".