3979449157 has 8 divisors (see below), whose sum is σ = 4069180800. Its totient is φ = 3889928544.

The previous prime is 3979449139. The next prime is 3979449161. The reversal of 3979449157 is 7519449793.

3979449157 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3979449157 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 (3979449127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14307 + ... + 90352.

It is an arithmetic number, because the mean of its divisors is an integer number (508647600).

Almost surely, 2^3979449157 is an apocalyptic number.

It is an amenable number.

3979449157 is a deficient number, since it is larger than the sum of its proper divisors (89731643).

3979449157 is a wasteful number, since it uses less digits than its factorization.

3979449157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105515.

The product of its digits is 8573040, while the sum is 58.

The square root of 3979449157 is about 63082.8753070118. The cubic root of 3979449157 is about 1584.6778471339.

The spelling of 3979449157 in words is "three billion, nine hundred seventy-nine million, four hundred forty-nine thousand, one hundred fifty-seven".