349623691 has 2 divisors, whose sum is σ = 349623692. Its totient is φ = 349623690.

The previous prime is 349623679. The next prime is 349623707. The reversal of 349623691 is 196326943.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 349623691 - 2²¹ = 347526539 is a prime.

It is equal to p_18784294 and since 349623691 and 18784294 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (349623601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174811845 + 174811846.

It is an arithmetic number, because the mean of its divisors is an integer number (174811846).

Almost surely, 2^349623691 is an apocalyptic number.

349623691 is a deficient number, since it is larger than the sum of its proper divisors (1).

349623691 is an equidigital number, since it uses as much as digits as its factorization.

349623691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 349623691 is about 18698.2269480291. The cubic root of 349623691 is about 704.4772148311.

The spelling of 349623691 in words is "three hundred forty-nine million, six hundred twenty-three thousand, six hundred ninety-one".