19492191 has 16 divisors (see below), whose sum is σ = 28990720. Its totient is φ = 12943800.

The previous prime is 19492163. The next prime is 19492199. The reversal of 19492191 is 19129491.

It is not a de Polignac number, because 19492191 - 2⁹ = 19491679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19492199) 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, 6366 + ... + 8916.

It is an arithmetic number, because the mean of its divisors is an integer number (1811920).

Almost surely, 2^19492191 is an apocalyptic number.

19492191 is a deficient number, since it is larger than the sum of its proper divisors (9498529).

19492191 is a wasteful number, since it uses less digits than its factorization.

19492191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843 (or 2837 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 19492191 is about 4414.9961494887. The cubic root of 19492191 is about 269.1246963138.

It can be divided in two parts, 19492 and 191, that added together give a 9-th power (19683 = 3⁹).

The spelling of 19492191 in words is "nineteen million, four hundred ninety-two thousand, one hundred ninety-one".