349724261 has 2 divisors, whose sum is σ = 349724262. Its totient is φ = 349724260.

The previous prime is 349724213. The next prime is 349724267. The reversal of 349724261 is 162427943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309971236 + 39753025 = 17606^2 + 6305^2 .

It is an emirp because it is prime and its reverse (162427943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 349724261 - 2⁶ = 349724197 is a prime.

It is a super-2 number, since 2×349724261² = 244614117463992242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349724267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174862130 + 174862131.

It is an arithmetic number, because the mean of its divisors is an integer number (174862131).

Almost surely, 2^349724261 is an apocalyptic number.

It is an amenable number.

349724261 is a deficient number, since it is larger than the sum of its proper divisors (1).

349724261 is an equidigital number, since it uses as much as digits as its factorization.

349724261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 349724261 is about 18700.9160470818. The cubic root of 349724261 is about 704.5447564795.

The spelling of 349724261 in words is "three hundred forty-nine million, seven hundred twenty-four thousand, two hundred sixty-one".