399126097 has 2 divisors, whose sum is σ = 399126098. Its totient is φ = 399126096.

The previous prime is 399126083. The next prime is 399126109. The reversal of 399126097 is 790621993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347300496 + 51825601 = 18636^2 + 7199^2 .

It is a cyclic number.

It is not a de Polignac number, because 399126097 - 2¹¹ = 399124049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399126047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199563048 + 199563049.

It is an arithmetic number, because the mean of its divisors is an integer number (199563049).

Almost surely, 2^399126097 is an apocalyptic number.

It is an amenable number.

399126097 is a deficient number, since it is larger than the sum of its proper divisors (1).

399126097 is an equidigital number, since it uses as much as digits as its factorization.

399126097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 399126097 is about 19978.1404790336. The cubic root of 399126097 is about 736.2693274568.

The spelling of 399126097 in words is "three hundred ninety-nine million, one hundred twenty-six thousand, ninety-seven".