3913538845 has 4 divisors (see below), whose sum is σ = 4696246620. Its totient is φ = 3130831072.

The previous prime is 3913538821. The next prime is 3913538857. The reversal of 3913538845 is 5488353193.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 612117081 + 3301421764 = 24741^2 + 57458^2 .

It is a cyclic number.

It is not a de Polignac number, because 3913538845 - 2⁹ = 3913538333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391353880 + ... + 391353889.

It is an arithmetic number, because the mean of its divisors is an integer number (1174061655).

Almost surely, 2^3913538845 is an apocalyptic number.

It is an amenable number.

3913538845 is a deficient number, since it is larger than the sum of its proper divisors (782707775).

3913538845 is an equidigital number, since it uses as much as digits as its factorization.

3913538845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782707774.

The product of its digits is 1555200, while the sum is 49.

The square root of 3913538845 is about 62558.2835841905. The cubic root of 3913538845 is about 1575.8802631178.

The spelling of 3913538845 in words is "three billion, nine hundred thirteen million, five hundred thirty-eight thousand, eight hundred forty-five".