1913209111 has 8 divisors (see below), whose sum is σ = 2090246544. Its totient is φ = 1736689920.

The previous prime is 1913209079. The next prime is 1913209127. The reversal of 1913209111 is 1119023191.

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

It is a cyclic number.

It is not a de Polignac number, because 1913209111 - 2⁵ = 1913209079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1913209111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913209811) 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, 121816 + ... + 136621.

It is an arithmetic number, because the mean of its divisors is an integer number (261280818).

Almost surely, 2^1913209111 is an apocalyptic number.

1913209111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1913209111 is a deficient number, since it is larger than the sum of its proper divisors (177037433).

1913209111 is a wasteful number, since it uses less digits than its factorization.

1913209111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259121.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 1913209111 is about 43740.2458955137. The cubic root of 1913209111 is about 1241.4259331164.

The spelling of 1913209111 in words is "one billion, nine hundred thirteen million, two hundred nine thousand, one hundred eleven".