3960695421 has 16 divisors (see below), whose sum is σ = 5906561920. Its totient is φ = 2622974400.

The previous prime is 3960695399. The next prime is 3960695423. The reversal of 3960695421 is 1245960693.

3960695421 is a `hidden beast` number, since 39 + 606 + 9 + 5 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 3960695421 - 2⁹ = 3960694909 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 (3960695423) 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, 481660 + ... + 489813.

It is an arithmetic number, because the mean of its divisors is an integer number (369160120).

Almost surely, 2^3960695421 is an apocalyptic number.

It is an amenable number.

3960695421 is a deficient number, since it is larger than the sum of its proper divisors (1945866499).

3960695421 is a wasteful number, since it uses less digits than its factorization.

3960695421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971633 (or 971627 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 3960695421 is about 62934.0561302066. The cubic root of 3960695421 is about 1582.1845843823.

The spelling of 3960695421 in words is "three billion, nine hundred sixty million, six hundred ninety-five thousand, four hundred twenty-one".