19122087 has 4 divisors (see below), whose sum is σ = 25496120. Its totient is φ = 12748056.

The previous prime is 19122083. The next prime is 19122119. The reversal of 19122087 is 78022191.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19122087 - 2² = 19122083 is a prime.

It is a super-2 number, since 2×19122087² = 731308422471138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19122083) 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, 3187012 + ... + 3187017.

It is an arithmetic number, because the mean of its divisors is an integer number (6374030).

Almost surely, 2^19122087 is an apocalyptic number.

19122087 is a deficient number, since it is larger than the sum of its proper divisors (6374033).

19122087 is an equidigital number, since it uses as much as digits as its factorization.

19122087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6374032.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 19122087 is about 4372.8808581986. The cubic root of 19122087 is about 267.4104839208.

The spelling of 19122087 in words is "nineteen million, one hundred twenty-two thousand, eighty-seven".