19063997 has 4 divisors (see below), whose sum is σ = 19332576. Its totient is φ = 18795420.

The previous prime is 19063969. The next prime is 19064027. The reversal of 19063997 is 79936091.

It is a happy number.

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 19063997 - 2⁸ = 19063741 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 (19063907) 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 3 ways as a sum of consecutive naturals, for example, 134183 + ... + 134324.

It is an arithmetic number, because the mean of its divisors is an integer number (4833144).

Almost surely, 2^19063997 is an apocalyptic number.

It is an amenable number.

19063997 is a deficient number, since it is larger than the sum of its proper divisors (268579).

19063997 is an equidigital number, since it uses as much as digits as its factorization.

19063997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268578.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 19063997 is about 4366.2337317189. The cubic root of 19063997 is about 267.1394250930.

The spelling of 19063997 in words is "nineteen million, sixty-three thousand, nine hundred ninety-seven".