399097 has 2 divisors, whose sum is σ = 399098. Its totient is φ = 399096.

The previous prime is 399079. The next prime is 399101. The reversal of 399097 is 790993.

It is a happy number.

Together with previous prime (399079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385641 + 13456 = 621^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 399097 - 2⁷ = 398969 is a prime.

It is a Chen prime.

399097 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (399067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199548 + 199549.

It is an arithmetic number, because the mean of its divisors is an integer number (199549).

2³⁹⁹⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

399097 is a deficient number, since it is larger than the sum of its proper divisors (1).

399097 is an equidigital number, since it uses as much as digits as its factorization.

399097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 399097 is about 631.7412444981. The cubic root of 399097 is about 73.6251435242.

The spelling of 399097 in words is "three hundred ninety-nine thousand, ninety-seven".