390347129 has 2 divisors, whose sum is σ = 390347130. Its totient is φ = 390347128.

The previous prime is 390347117. The next prime is 390347131. The reversal of 390347129 is 921743093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344473600 + 45873529 = 18560^2 + 6773^2 .

It is a cyclic number.

It is not a de Polignac number, because 390347129 - 2¹² = 390343033 is a prime.

It is a super-2 number, since 2×390347129² = 304741762237085282, which contains 22 as substring.

Together with 390347131, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 390347092 and 390347101.

It is not a weakly prime, because it can be changed into another prime (390347179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195173564 + 195173565.

It is an arithmetic number, because the mean of its divisors is an integer number (195173565).

Almost surely, 2^390347129 is an apocalyptic number.

It is an amenable number.

390347129 is a deficient number, since it is larger than the sum of its proper divisors (1).

390347129 is an equidigital number, since it uses as much as digits as its factorization.

390347129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 390347129 is about 19757.2044834283. The cubic root of 390347129 is about 730.8310601604.

The spelling of 390347129 in words is "three hundred ninety million, three hundred forty-seven thousand, one hundred twenty-nine".