340446149 has 2 divisors, whose sum is σ = 340446150. Its totient is φ = 340446148.

The previous prime is 340446089. The next prime is 340446151. The reversal of 340446149 is 941644043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335073025 + 5373124 = 18305^2 + 2318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340446149 is a prime.

Together with 340446151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340443149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170223074 + 170223075.

It is an arithmetic number, because the mean of its divisors is an integer number (170223075).

Almost surely, 2^340446149 is an apocalyptic number.

It is an amenable number.

340446149 is a deficient number, since it is larger than the sum of its proper divisors (1).

340446149 is an equidigital number, since it uses as much as digits as its factorization.

340446149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 340446149 is about 18451.1828618113. The cubic root of 340446149 is about 698.2583566720.

The spelling of 340446149 in words is "three hundred forty million, four hundred forty-six thousand, one hundred forty-nine".