1914137891 has 8 divisors (see below), whose sum is σ = 1941123600. Its totient is φ = 1887172992.

The previous prime is 1914137861. The next prime is 1914137917. The reversal of 1914137891 is 1987314191.

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 1914137891 - 2²⁶ = 1847029027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1914137821) 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, 324335 + ... + 330183.

It is an arithmetic number, because the mean of its divisors is an integer number (242640450).

Almost surely, 2^1914137891 is an apocalyptic number.

1914137891 is a deficient number, since it is larger than the sum of its proper divisors (26985709).

1914137891 is an equidigital number, since it uses as much as digits as its factorization.

1914137891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10405.

The product of its digits is 54432, while the sum is 44.

The square root of 1914137891 is about 43750.8616029445. The cubic root of 1914137891 is about 1241.6267867577.

The spelling of 1914137891 in words is "one billion, nine hundred fourteen million, one hundred thirty-seven thousand, eight hundred ninety-one".