3969181457 has 2 divisors, whose sum is σ = 3969181458. Its totient is φ = 3969181456.

The previous prime is 3969181427. The next prime is 3969181459. The reversal of 3969181457 is 7541819693.

3969181457 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3662791441 + 306390016 = 60521^2 + 17504^2 .

It is an emirp because it is prime and its reverse (7541819693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3969181457 - 2¹⁶ = 3969115921 is a prime.

Together with 3969181459, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3969181399 and 3969181408.

It is not a weakly prime, because it can be changed into another prime (3969181459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1984590728 + 1984590729.

It is an arithmetic number, because the mean of its divisors is an integer number (1984590729).

Almost surely, 2^3969181457 is an apocalyptic number.

It is an amenable number.

3969181457 is a deficient number, since it is larger than the sum of its proper divisors (1).

3969181457 is an equidigital number, since it uses as much as digits as its factorization.

3969181457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 3969181457 is about 63001.4401184608. The cubic root of 3969181457 is about 1583.3137545822.

The spelling of 3969181457 in words is "three billion, nine hundred sixty-nine million, one hundred eighty-one thousand, four hundred fifty-seven".