19420097 has 4 divisors (see below), whose sum is σ = 19461120. Its totient is φ = 19379076.

The previous prime is 19420081. The next prime is 19420123. The reversal of 19420097 is 79002491.

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 19420097 - 2⁴ = 19420081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19420007) 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, 19793 + ... + 20750.

It is an arithmetic number, because the mean of its divisors is an integer number (4865280).

Almost surely, 2^19420097 is an apocalyptic number.

It is an amenable number.

19420097 is a deficient number, since it is larger than the sum of its proper divisors (41023).

19420097 is an equidigital number, since it uses as much as digits as its factorization.

19420097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41022.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 19420097 is about 4406.8239129786. The cubic root of 19420097 is about 268.7924907037.

The spelling of 19420097 in words is "nineteen million, four hundred twenty thousand, ninety-seven".