3977357613 has 4 divisors (see below), whose sum is σ = 5303143488. Its totient is φ = 2651571740.

The previous prime is 3977357581. The next prime is 3977357633. The reversal of 3977357613 is 3167537793.

3977357613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 3977357613 - 2⁵ = 3977357581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977357633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662892933 + ... + 662892938.

It is an arithmetic number, because the mean of its divisors is an integer number (1325785872).

Almost surely, 2^3977357613 is an apocalyptic number.

It is an amenable number.

3977357613 is a deficient number, since it is larger than the sum of its proper divisors (1325785875).

3977357613 is a wasteful number, since it uses less digits than its factorization.

3977357613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325785874.

The product of its digits is 2500470, while the sum is 51.

The square root of 3977357613 is about 63066.2953803377. The cubic root of 3977357613 is about 1584.4001701528.

The spelling of 3977357613 in words is "three billion, nine hundred seventy-seven million, three hundred fifty-seven thousand, six hundred thirteen".