397186039 has 2 divisors, whose sum is σ = 397186040. Its totient is φ = 397186038.

The previous prime is 397186037. The next prime is 397186091. The reversal of 397186039 is 930681793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397186039 - 2¹ = 397186037 is a prime.

Together with 397186037, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 397186039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397186037) 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, 198593019 + 198593020.

It is an arithmetic number, because the mean of its divisors is an integer number (198593020).

Almost surely, 2^397186039 is an apocalyptic number.

397186039 is a deficient number, since it is larger than the sum of its proper divisors (1).

397186039 is an equidigital number, since it uses as much as digits as its factorization.

397186039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 397186039 is about 19929.5268132487. The cubic root of 397186039 is about 735.0744453880.

The spelling of 397186039 in words is "three hundred ninety-seven million, one hundred eighty-six thousand, thirty-nine".