4191989697 has 12 divisors (see below), whose sum is σ = 6920110080. Its totient is φ = 2395422648.

The previous prime is 4191989677. The next prime is 4191989731. The reversal of 4191989697 is 7969891914.

It is not a de Polignac number, because 4191989697 - 2⁷ = 4191989569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 66539519 = 4191989697 / (4 + 1 + 9 + 1 + 9 + 8 + 9 + 6 + 9 + 7).

It is not an unprimeable number, because it can be changed into a prime (4191989657) 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, 33269697 + ... + 33269822.

It is an arithmetic number, because the mean of its divisors is an integer number (576675840).

Almost surely, 2^4191989697 is an apocalyptic number.

It is an amenable number.

4191989697 is a deficient number, since it is larger than the sum of its proper divisors (2728120383).

4191989697 is a wasteful number, since it uses less digits than its factorization.

4191989697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66539532 (or 66539529 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The square root of 4191989697 is about 64745.5766597225. The cubic root of 4191989697 is about 1612.4022748058.

The spelling of 4191989697 in words is "four billion, one hundred ninety-one million, nine hundred eighty-nine thousand, six hundred ninety-seven".