347178397 has 2 divisors, whose sum is σ = 347178398. Its totient is φ = 347178396.

The previous prime is 347178379. The next prime is 347178421. The reversal of 347178397 is 793871743.

Together with previous prime (347178379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241211961 + 105966436 = 15531^2 + 10294^2 .

It is a cyclic number.

It is not a de Polignac number, because 347178397 - 2¹⁹ = 346654109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 347178397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (347178347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173589198 + 173589199.

It is an arithmetic number, because the mean of its divisors is an integer number (173589199).

Almost surely, 2^347178397 is an apocalyptic number.

It is an amenable number.

347178397 is a deficient number, since it is larger than the sum of its proper divisors (1).

347178397 is an equidigital number, since it uses as much as digits as its factorization.

347178397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 49.

The square root of 347178397 is about 18632.7238212774. The cubic root of 347178397 is about 702.8309822747.

The spelling of 347178397 in words is "three hundred forty-seven million, one hundred seventy-eight thousand, three hundred ninety-seven".