391262741 has 2 divisors, whose sum is σ = 391262742. Its totient is φ = 391262740.

The previous prime is 391262731. The next prime is 391262761. The reversal of 391262741 is 147262193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359102500 + 32160241 = 18950^2 + 5671^2 .

It is a cyclic number.

It is not a de Polignac number, because 391262741 - 2¹⁴ = 391246357 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391262731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195631370 + 195631371.

It is an arithmetic number, because the mean of its divisors is an integer number (195631371).

Almost surely, 2^391262741 is an apocalyptic number.

It is an amenable number.

391262741 is a deficient number, since it is larger than the sum of its proper divisors (1).

391262741 is an equidigital number, since it uses as much as digits as its factorization.

391262741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 391262741 is about 19780.3625093172. The cubic root of 391262741 is about 731.4020350011.

The spelling of 391262741 in words is "three hundred ninety-one million, two hundred sixty-two thousand, seven hundred forty-one".