349694381 has 2 divisors, whose sum is σ = 349694382. Its totient is φ = 349694380.

The previous prime is 349694341. The next prime is 349694399. The reversal of 349694381 is 183496943.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291248356 + 58446025 = 17066^2 + 7645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-349694381 is a prime.

It is a super-2 number, since 2×349694381² = 244572320205946322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349694311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174847190 + 174847191.

It is an arithmetic number, because the mean of its divisors is an integer number (174847191).

Almost surely, 2^349694381 is an apocalyptic number.

It is an amenable number.

349694381 is a deficient number, since it is larger than the sum of its proper divisors (1).

349694381 is an equidigital number, since it uses as much as digits as its factorization.

349694381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 47.

The square root of 349694381 is about 18700.1171386705. The cubic root of 349694381 is about 704.5246907694.

The spelling of 349694381 in words is "three hundred forty-nine million, six hundred ninety-four thousand, three hundred eighty-one".