3936469681 has 2 divisors, whose sum is σ = 3936469682. Its totient is φ = 3936469680.

The previous prime is 3936469643. The next prime is 3936469687. The reversal of 3936469681 is 1869646393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2915028081 + 1021441600 = 53991^2 + 31960^2 .

It is an emirp because it is prime and its reverse (1869646393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3936469681 - 2¹³ = 3936461489 is a prime.

It is a super-2 number, since 2×3936469681² = 30991587098864483522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3936469687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1968234840 + 1968234841.

It is an arithmetic number, because the mean of its divisors is an integer number (1968234841).

Almost surely, 2^3936469681 is an apocalyptic number.

It is an amenable number.

3936469681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3936469681 is an equidigital number, since it uses as much as digits as its factorization.

3936469681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 55.

The square root of 3936469681 is about 62741.2916746221. The cubic root of 3936469681 is about 1578.9521547999.

The spelling of 3936469681 in words is "three billion, nine hundred thirty-six million, four hundred sixty-nine thousand, six hundred eighty-one".