19494897 has 4 divisors (see below), whose sum is σ = 25993200. Its totient is φ = 12996596.

The previous prime is 19494863. The next prime is 19494899. The reversal of 19494897 is 79849491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19494897 - 2¹⁴ = 19478513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19494899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3249147 + ... + 3249152.

It is an arithmetic number, because the mean of its divisors is an integer number (6498300).

Almost surely, 2^19494897 is an apocalyptic number.

It is an amenable number.

19494897 is a deficient number, since it is larger than the sum of its proper divisors (6498303).

19494897 is an equidigital number, since it uses as much as digits as its factorization.

19494897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6498302.

The product of its digits is 653184, while the sum is 51.

The square root of 19494897 is about 4415.3025943869. The cubic root of 19494897 is about 269.1371494671.

The spelling of 19494897 in words is "nineteen million, four hundred ninety-four thousand, eight hundred ninety-seven".