247138370137 has 2 divisors, whose sum is σ = 247138370138. Its totient is φ = 247138370136.

The previous prime is 247138370123. The next prime is 247138370177. The reversal of 247138370137 is 731073831742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241430718736 + 5707651401 = 491356^2 + 75549^2 .

It is a cyclic number.

It is not a de Polignac number, because 247138370137 - 2¹⁹ = 247137845849 is a prime.

It is a super-2 number, since 2×247138370137² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247138370107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123569185068 + 123569185069.

It is an arithmetic number, because the mean of its divisors is an integer number (123569185069).

Almost surely, 2^247138370137 is an apocalyptic number.

It is an amenable number.

247138370137 is a deficient number, since it is larger than the sum of its proper divisors (1).

247138370137 is an equidigital number, since it uses as much as digits as its factorization.

247138370137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 247138370137 in words is "two hundred forty-seven billion, one hundred thirty-eight million, three hundred seventy thousand, one hundred thirty-seven".