1919913189 has 8 divisors (see below), whose sum is σ = 2560133472. Its totient is φ = 1279817520.

The previous prime is 1919913169. The next prime is 1919913209. The reversal of 1919913189 is 9813199191.

It is an interprime number because it is at equal distance from previous prime (1919913169) and next prime (1919913209).

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

It is not a de Polignac number, because 1919913189 - 2⁸ = 1919912933 is a prime.

It is a super-2 number, since 2×1919913189² = 7372133306592299442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919913119) 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, 14254 + ... + 63584.

It is an arithmetic number, because the mean of its divisors is an integer number (320016684).

Almost surely, 2^1919913189 is an apocalyptic number.

It is an amenable number.

1919913189 is a deficient number, since it is larger than the sum of its proper divisors (640220283).

1919913189 is a wasteful number, since it uses less digits than its factorization.

1919913189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62307.

The product of its digits is 157464, while the sum is 51.

The square root of 1919913189 is about 43816.8139987380. The cubic root of 1919913189 is about 1242.8742700186.

The spelling of 1919913189 in words is "one billion, nine hundred nineteen million, nine hundred thirteen thousand, one hundred eighty-nine".