391313141 has 2 divisors, whose sum is σ = 391313142. Its totient is φ = 391313140.

The previous prime is 391313119. The next prime is 391313159. The reversal of 391313141 is 141313193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344102500 + 47210641 = 18550^2 + 6871^2 .

It is a cyclic number.

It is not a de Polignac number, because 391313141 - 2⁶ = 391313077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 391313141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391313441) 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, 195656570 + 195656571.

It is an arithmetic number, because the mean of its divisors is an integer number (195656571).

Almost surely, 2^391313141 is an apocalyptic number.

It is an amenable number.

391313141 is a deficient number, since it is larger than the sum of its proper divisors (1).

391313141 is an equidigital number, since it uses as much as digits as its factorization.

391313141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 391313141 is about 19781.6364591001. The cubic root of 391313141 is about 731.4334385194.

The spelling of 391313141 in words is "three hundred ninety-one million, three hundred thirteen thousand, one hundred forty-one".