3979929397 has 4 divisors (see below), whose sum is σ = 3983091840. Its totient is φ = 3976766956.

The previous prime is 3979929337. The next prime is 3979929427. The reversal of 3979929397 is 7939299793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7939299793 = 1237 ⋅6418189.

It is a cyclic number.

It is not a de Polignac number, because 3979929397 - 2¹⁵ = 3979896629 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 (3979929337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1579333 + ... + 1581850.

It is an arithmetic number, because the mean of its divisors is an integer number (995772960).

Almost surely, 2^3979929397 is an apocalyptic number.

It is an amenable number.

3979929397 is a deficient number, since it is larger than the sum of its proper divisors (3162443).

3979929397 is a wasteful number, since it uses less digits than its factorization.

3979929397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162442.

The product of its digits is 52081218, while the sum is 67.

The square root of 3979929397 is about 63086.6816134753. The cubic root of 3979929397 is about 1584.7415908873.

It can be divided in two parts, 39799 and 29397, that added together give a palindrome (69196).

The spelling of 3979929397 in words is "three billion, nine hundred seventy-nine million, nine hundred twenty-nine thousand, three hundred ninety-seven".