3961569401 has 2 divisors, whose sum is σ = 3961569402. Its totient is φ = 3961569400.

The previous prime is 3961569383. The next prime is 3961569413. The reversal of 3961569401 is 1049651693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3941328400 + 20241001 = 62780^2 + 4499^2 .

It is an emirp because it is prime and its reverse (1049651693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3961569401 - 2¹⁴ = 3961553017 is a prime.

It is not a weakly prime, because it can be changed into another prime (3961569431) 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, 1980784700 + 1980784701.

It is an arithmetic number, because the mean of its divisors is an integer number (1980784701).

Almost surely, 2^3961569401 is an apocalyptic number.

It is an amenable number.

3961569401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961569401 is an equidigital number, since it uses as much as digits as its factorization.

3961569401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 3961569401 is about 62940.9993644842. Note that the first 3 decimals coincide. The cubic root of 3961569401 is about 1582.3009524976.

The spelling of 3961569401 in words is "three billion, nine hundred sixty-one million, five hundred sixty-nine thousand, four hundred one".