347642261 has 2 divisors, whose sum is σ = 347642262. Its totient is φ = 347642260.

The previous prime is 347642257. The next prime is 347642287. The reversal of 347642261 is 162246743.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279892900 + 67749361 = 16730^2 + 8231^2 .

It is a cyclic number.

It is not a de Polignac number, because 347642261 - 2² = 347642257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (347642461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173821130 + 173821131.

It is an arithmetic number, because the mean of its divisors is an integer number (173821131).

Almost surely, 2^347642261 is an apocalyptic number.

It is an amenable number.

347642261 is a deficient number, since it is larger than the sum of its proper divisors (1).

347642261 is an equidigital number, since it uses as much as digits as its factorization.

347642261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 35.

The square root of 347642261 is about 18645.1672290704. The cubic root of 347642261 is about 703.1438597503.

The spelling of 347642261 in words is "three hundred forty-seven million, six hundred forty-two thousand, two hundred sixty-one".