1916398673 has 12 divisors (see below), whose sum is σ = 2281126320. Its totient is φ = 1604425032.

The previous prime is 1916398643. The next prime is 1916398717. The reversal of 1916398673 is 3768936191.

It is a happy number.

It is not a de Polignac number, because 1916398673 - 2¹⁴ = 1916382289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1916398613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452663 + ... + 456876.

It is an arithmetic number, because the mean of its divisors is an integer number (190093860).

Almost surely, 2^1916398673 is an apocalyptic number.

It is an amenable number.

1916398673 is a deficient number, since it is larger than the sum of its proper divisors (364727647).

1916398673 is an equidigital number, since it uses as much as digits as its factorization.

1916398673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909596 (or 909589 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 53.

The square root of 1916398673 is about 43776.6909781907. The cubic root of 1916398673 is about 1242.1154215450.

The spelling of 1916398673 in words is "one billion, nine hundred sixteen million, three hundred ninety-eight thousand, six hundred seventy-three".