3955143421 has 2 divisors, whose sum is σ = 3955143422. Its totient is φ = 3955143420.

The previous prime is 3955143383. The next prime is 3955143461. The reversal of 3955143421 is 1243415593.

3955143421 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., 3777454521 + 177688900 = 61461^2 + 13330^2 .

It is a cyclic number.

It is not a de Polignac number, because 3955143421 - 2⁹ = 3955142909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3955143461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1977571710 + 1977571711.

It is an arithmetic number, because the mean of its divisors is an integer number (1977571711).

Almost surely, 2^3955143421 is an apocalyptic number.

It is an amenable number.

3955143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3955143421 is an equidigital number, since it uses as much as digits as its factorization.

3955143421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 3955143421 is about 62889.9309985311. The cubic root of 3955143421 is about 1581.4449502518. Note that the first 3 decimals are identical.

The spelling of 3955143421 in words is "three billion, nine hundred fifty-five million, one hundred forty-three thousand, four hundred twenty-one".