19679697 has 12 divisors (see below), whose sum is σ = 29662464. Its totient is φ = 12549240.

The previous prime is 19679669. The next prime is 19679701. The reversal of 19679697 is 79697691.

It is not a de Polignac number, because 19679697 - 2¹⁵ = 19646929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19679617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47329 + ... + 47742.

It is an arithmetic number, because the mean of its divisors is an integer number (2471872).

Almost surely, 2^19679697 is an apocalyptic number.

It is an amenable number.

19679697 is a deficient number, since it is larger than the sum of its proper divisors (9982767).

19679697 is a wasteful number, since it uses less digits than its factorization.

19679697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95100 (or 95097 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 19679697 is about 4436.1804516949. The cubic root of 19679697 is about 269.9848962745.

It can be divided in two parts, 1967 and 9697, that added together give a square (11664 = 108²).

The spelling of 19679697 in words is "nineteen million, six hundred seventy-nine thousand, six hundred ninety-seven".