347438677877 has 2 divisors, whose sum is σ = 347438677878. Its totient is φ = 347438677876.

The previous prime is 347438677727. The next prime is 347438677921. The reversal of 347438677877 is 778776834743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195327757681 + 152110920196 = 441959^2 + 390014^2 .

It is a cyclic number.

It is not a de Polignac number, because 347438677877 - 2¹⁰ = 347438676853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 347438677877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (347438677177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173719338938 + 173719338939.

It is an arithmetic number, because the mean of its divisors is an integer number (173719338939).

Almost surely, 2^347438677877 is an apocalyptic number.

It is an amenable number.

347438677877 is a deficient number, since it is larger than the sum of its proper divisors (1).

347438677877 is an equidigital number, since it uses as much as digits as its factorization.

347438677877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 929359872, while the sum is 71.

The spelling of 347438677877 in words is "three hundred forty-seven billion, four hundred thirty-eight million, six hundred seventy-seven thousand, eight hundred seventy-seven".