3979506405 has 16 divisors (see below), whose sum is σ = 7276811904. Its totient is φ = 1819202880.

The previous prime is 3979506379. The next prime is 3979506407. The reversal of 3979506405 is 5046059793.

It is not a de Polignac number, because 3979506405 - 2⁷ = 3979506277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979506407) 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, 18949926 + ... + 18950135.

It is an arithmetic number, because the mean of its divisors is an integer number (454800744).

Almost surely, 2^3979506405 is an apocalyptic number.

3979506405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3979506405 is a deficient number, since it is larger than the sum of its proper divisors (3297305499).

3979506405 is a wasteful number, since it uses less digits than its factorization.

3979506405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37900076.

The product of its (nonzero) digits is 1020600, while the sum is 48.

The square root of 3979506405 is about 63083.3290576837. The cubic root of 3979506405 is about 1584.6854461088.

The spelling of 3979506405 in words is "three billion, nine hundred seventy-nine million, five hundred six thousand, four hundred five".