3931686289 has 2 divisors, whose sum is σ = 3931686290. Its totient is φ = 3931686288.

The previous prime is 3931686257. The next prime is 3931686323. The reversal of 3931686289 is 9826861393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3916631889 + 15054400 = 62583^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 3931686289 - 2⁵ = 3931686257 is a prime.

It is a super-2 number, since 2×3931686289² = 30916314150221183042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3931686229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965843144 + 1965843145.

It is an arithmetic number, because the mean of its divisors is an integer number (1965843145).

Almost surely, 2^3931686289 is an apocalyptic number.

It is an amenable number.

3931686289 is a deficient number, since it is larger than the sum of its proper divisors (1).

3931686289 is an equidigital number, since it uses as much as digits as its factorization.

3931686289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 55.

The square root of 3931686289 is about 62703.1601197260. The cubic root of 3931686289 is about 1578.3123422251.

The spelling of 3931686289 in words is "three billion, nine hundred thirty-one million, six hundred eighty-six thousand, two hundred eighty-nine".