3934455421 has 16 divisors (see below), whose sum is σ = 4354686000. Its totient is φ = 3531161088.

The previous prime is 3934455403. The next prime is 3934455431. The reversal of 3934455421 is 1245544393.

3934455421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 383964025 + 3550491396 = 19595^2 + 59586^2 .

It is not a de Polignac number, because 3934455421 - 2²³ = 3926066813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3934455431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1224465 + ... + 1227673.

It is an arithmetic number, because the mean of its divisors is an integer number (272167875).

Almost surely, 2^3934455421 is an apocalyptic number.

It is an amenable number.

3934455421 is a deficient number, since it is larger than the sum of its proper divisors (420230579).

3934455421 is a wasteful number, since it uses less digits than its factorization.

3934455421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808.

The product of its digits is 259200, while the sum is 40.

The square root of 3934455421 is about 62725.2375125037. The cubic root of 3934455421 is about 1578.6827964624.

The spelling of 3934455421 in words is "three billion, nine hundred thirty-four million, four hundred fifty-five thousand, four hundred twenty-one".