340401749 has 2 divisors, whose sum is σ = 340401750. Its totient is φ = 340401748.

The previous prime is 340401703. The next prime is 340401751. The reversal of 340401749 is 947104043.

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., 197599249 + 142802500 = 14057^2 + 11950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340401749 is a prime.

Together with 340401751, 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 (340401769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170200874 + 170200875.

It is an arithmetic number, because the mean of its divisors is an integer number (170200875).

Almost surely, 2^340401749 is an apocalyptic number.

It is an amenable number.

340401749 is a deficient number, since it is larger than the sum of its proper divisors (1).

340401749 is an equidigital number, since it uses as much as digits as its factorization.

340401749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 340401749 is about 18449.9796476853. The cubic root of 340401749 is about 698.2280004086.

The spelling of 340401749 in words is "three hundred forty million, four hundred one thousand, seven hundred forty-nine".