1889696397 has 16 divisors (see below), whose sum is σ = 2571041088. Its totient is φ = 1234147200.

The previous prime is 1889696383. The next prime is 1889696407. The reversal of 1889696397 is 7936969881.

It is not a de Polignac number, because 1889696397 - 2⁷ = 1889696269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889696317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99897 + ... + 117297.

It is an arithmetic number, because the mean of its divisors is an integer number (160690068).

Almost surely, 2^1889696397 is an apocalyptic number.

It is an amenable number.

1889696397 is a deficient number, since it is larger than the sum of its proper divisors (681344691).

1889696397 is a wasteful number, since it uses less digits than its factorization.

1889696397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18140.

The product of its digits is 35271936, while the sum is 66.

The square root of 1889696397 is about 43470.6383320972. The cubic root of 1889696397 is about 1236.3193835095.

The spelling of 1889696397 in words is "one billion, eight hundred eighty-nine million, six hundred ninety-six thousand, three hundred ninety-seven".