391374941 has 2 divisors, whose sum is σ = 391374942. Its totient is φ = 391374940.

The previous prime is 391374913. The next prime is 391374943. The reversal of 391374941 is 149473193.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235499716 + 155875225 = 15346^2 + 12485^2 .

It is an emirp because it is prime and its reverse (149473193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 391374941 - 2¹⁸ = 391112797 is a prime.

Together with 391374943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391374943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195687470 + 195687471.

It is an arithmetic number, because the mean of its divisors is an integer number (195687471).

Almost surely, 2^391374941 is an apocalyptic number.

It is an amenable number.

391374941 is a deficient number, since it is larger than the sum of its proper divisors (1).

391374941 is an equidigital number, since it uses as much as digits as its factorization.

391374941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 391374941 is about 19783.1984522220. The cubic root of 391374941 is about 731.4719415343.

The spelling of 391374941 in words is "three hundred ninety-one million, three hundred seventy-four thousand, nine hundred forty-one".