349045981 has 2 divisors, whose sum is σ = 349045982. Its totient is φ = 349045980.

The previous prime is 349045967. The next prime is 349045987. The reversal of 349045981 is 189540943.

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., 341917081 + 7128900 = 18491^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 349045981 - 2⁹ = 349045469 is a prime.

It is a super-2 number, since 2×349045981² = 243666193704504722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349045987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174522990 + 174522991.

It is an arithmetic number, because the mean of its divisors is an integer number (174522991).

Almost surely, 2^349045981 is an apocalyptic number.

It is an amenable number.

349045981 is a deficient number, since it is larger than the sum of its proper divisors (1).

349045981 is an equidigital number, since it uses as much as digits as its factorization.

349045981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 349045981 is about 18682.7723049873. The cubic root of 349045981 is about 704.0889803649.

The spelling of 349045981 in words is "three hundred forty-nine million, forty-five thousand, nine hundred eighty-one".