340172549 has 2 divisors, whose sum is σ = 340172550. Its totient is φ = 340172548.

The previous prime is 340172489. The next prime is 340172551. The reversal of 340172549 is 945271043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301022500 + 39150049 = 17350^2 + 6257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340172549 is a prime.

Together with 340172551, 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 (340172849) 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, 170086274 + 170086275.

It is an arithmetic number, because the mean of its divisors is an integer number (170086275).

Almost surely, 2^340172549 is an apocalyptic number.

It is an amenable number.

340172549 is a deficient number, since it is larger than the sum of its proper divisors (1).

340172549 is an equidigital number, since it uses as much as digits as its factorization.

340172549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 340172549 is about 18443.7672128012. The cubic root of 340172549 is about 698.0712544560.

The spelling of 340172549 in words is "three hundred forty million, one hundred seventy-two thousand, five hundred forty-nine".