247742833813 has 2 divisors, whose sum is σ = 247742833814. Its totient is φ = 247742833812.

The previous prime is 247742833799. The next prime is 247742833837. The reversal of 247742833813 is 318338247742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246073539364 + 1669294449 = 496058^2 + 40857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247742833813 is a prime.

It is a super-2 number, since 2×247742833813² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247742803813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123871416906 + 123871416907.

It is an arithmetic number, because the mean of its divisors is an integer number (123871416907).

Almost surely, 2^247742833813 is an apocalyptic number.

It is an amenable number.

247742833813 is a deficient number, since it is larger than the sum of its proper divisors (1).

247742833813 is an equidigital number, since it uses as much as digits as its factorization.

247742833813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5419008, while the sum is 52.

The spelling of 247742833813 in words is "two hundred forty-seven billion, seven hundred forty-two million, eight hundred thirty-three thousand, eight hundred thirteen".