19697129 has 8 divisors (see below), whose sum is σ = 21044640. Its totient is φ = 18380736.

The previous prime is 19697123. The next prime is 19697137. The reversal of 19697129 is 92179691.

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 19697129 - 2⁴ = 19697113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19697129.

It is not an unprimeable number, because it can be changed into a prime (19697123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6464 + ... + 9009.

It is an arithmetic number, because the mean of its divisors is an integer number (2630580).

Almost surely, 2^19697129 is an apocalyptic number.

19697129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19697129 is a deficient number, since it is larger than the sum of its proper divisors (1347511).

19697129 is a wasteful number, since it uses less digits than its factorization.

19697129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15559.

The product of its digits is 61236, while the sum is 44.

The square root of 19697129 is about 4438.1447700588. The cubic root of 19697129 is about 270.0645890289.

The spelling of 19697129 in words is "nineteen million, six hundred ninety-seven thousand, one hundred twenty-nine".