1913889849 has 8 divisors (see below), whose sum is σ = 2595105120. Its totient is φ = 1254300576.

The previous prime is 1913889839. The next prime is 1913889851. The reversal of 1913889849 is 9489883191.

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

It is not a de Polignac number, because 1913889849 - 2⁴ = 1913889833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1913889792 and 1913889801.

It is not an unprimeable number, because it can be changed into a prime (1913889839) 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, 5406292 + ... + 5406645.

It is an arithmetic number, because the mean of its divisors is an integer number (324388140).

Almost surely, 2^1913889849 is an apocalyptic number.

It is an amenable number.

1913889849 is a deficient number, since it is larger than the sum of its proper divisors (681215271).

1913889849 is a wasteful number, since it uses less digits than its factorization.

1913889849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10812999.

The product of its digits is 4478976, while the sum is 60.

The square root of 1913889849 is about 43748.0268012170. The cubic root of 1913889849 is about 1241.5731527089.

The spelling of 1913889849 in words is "one billion, nine hundred thirteen million, eight hundred eighty-nine thousand, eight hundred forty-nine".