1911830113 has 4 divisors (see below), whose sum is σ = 1926424368. Its totient is φ = 1897235860.

The previous prime is 1911830101. The next prime is 1911830119. The reversal of 1911830113 is 3110381191.

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 a de Polignac number, because none of the positive numbers 2^k-1911830113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1911830119) 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, 7296931 + ... + 7297192.

It is an arithmetic number, because the mean of its divisors is an integer number (481606092).

Almost surely, 2^1911830113 is an apocalyptic number.

It is an amenable number.

1911830113 is a deficient number, since it is larger than the sum of its proper divisors (14594255).

1911830113 is a wasteful number, since it uses less digits than its factorization.

1911830113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14594254.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1911830113 is about 43724.4795623687. The cubic root of 1911830113 is about 1241.1275974842.

The spelling of 1911830113 in words is "one billion, nine hundred eleven million, eight hundred thirty thousand, one hundred thirteen".