343401977 has 2 divisors, whose sum is σ = 343401978. Its totient is φ = 343401976.

The previous prime is 343401967. The next prime is 343402009. The reversal of 343401977 is 779104343.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 333391081 + 10010896 = 18259^2 + 3164^2 .

It is a cyclic number.

It is not a de Polignac number, because 343401977 - 2¹⁸ = 343139833 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 343401977.

It is not a weakly prime, because it can be changed into another prime (343401907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171700988 + 171700989.

It is an arithmetic number, because the mean of its divisors is an integer number (171700989).

Almost surely, 2^343401977 is an apocalyptic number.

It is an amenable number.

343401977 is a deficient number, since it is larger than the sum of its proper divisors (1).

343401977 is an equidigital number, since it uses as much as digits as its factorization.

343401977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 343401977 is about 18531.1083586492. The cubic root of 343401977 is about 700.2733469868.

The spelling of 343401977 in words is "three hundred forty-three million, four hundred one thousand, nine hundred seventy-seven".