19939249 has 8 divisors (see below), whose sum is σ = 23031648. Its totient is φ = 17060160.

The previous prime is 19939237. The next prime is 19939273. The reversal of 19939249 is 94293991.

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 19939249 - 2⁷ = 19939121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19939199 and 19939208.

It is not an unprimeable number, because it can be changed into a prime (19939349) 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, 53127 + ... + 53500.

It is an arithmetic number, because the mean of its divisors is an integer number (2878956).

Almost surely, 2^19939249 is an apocalyptic number.

It is an amenable number.

19939249 is a deficient number, since it is larger than the sum of its proper divisors (3092399).

19939249 is a wasteful number, since it uses less digits than its factorization.

19939249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106655.

The product of its digits is 157464, while the sum is 46.

The square root of 19939249 is about 4465.3386209783. The cubic root of 19939249 is about 271.1666436018.

The spelling of 19939249 in words is "nineteen million, nine hundred thirty-nine thousand, two hundred forty-nine".