3993405901 has 12 divisors (see below), whose sum is σ = 4122464668. Its totient is φ = 3867939072.

The previous prime is 3993405887. The next prime is 3993406003. The reversal of 3993405901 is 1095043993.

3993405901 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 2 ways, for example, as 585882025 + 3407523876 = 24205^2 + 58374^2 .

It is not a de Polignac number, because 3993405901 - 2⁵ = 3993405869 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 (3993405401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204955 + ... + 223591.

Almost surely, 2^3993405901 is an apocalyptic number.

It is an amenable number.

3993405901 is a deficient number, since it is larger than the sum of its proper divisors (129058767).

3993405901 is an equidigital number, since it uses as much as digits as its factorization.

3993405901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18828 (or 18781 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 3993405901 is about 63193.4007709666. The cubic root of 3993405901 is about 1586.5282822241.

The spelling of 3993405901 in words is "three billion, nine hundred ninety-three million, four hundred five thousand, nine hundred one".