3969462181 has 2 divisors, whose sum is σ = 3969462182. Its totient is φ = 3969462180.

The previous prime is 3969462169. The next prime is 3969462247. The reversal of 3969462181 is 1812649693.

It is a happy number.

3969462181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3923017956 + 46444225 = 62634^2 + 6815^2 .

It is an emirp because it is prime and its reverse (1812649693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3969462181 - 2⁵ = 3969462149 is a prime.

It is a super-2 number, since 2×3969462181² = 31513260012778553522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3969462151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1984731090 + 1984731091.

It is an arithmetic number, because the mean of its divisors is an integer number (1984731091).

Almost surely, 2^3969462181 is an apocalyptic number.

It is an amenable number.

3969462181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3969462181 is an equidigital number, since it uses as much as digits as its factorization.

3969462181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 3969462181 is about 63003.6679963953. The cubic root of 3969462181 is about 1583.3510808081.

The spelling of 3969462181 in words is "three billion, nine hundred sixty-nine million, four hundred sixty-two thousand, one hundred eighty-one".