19121039 has 8 divisors (see below), whose sum is σ = 23138208. Its totient is φ = 15425280.

The previous prime is 19121029. The next prime is 19121051. The reversal of 19121039 is 93012191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19121039 - 2¹² = 19116943 is a prime.

It is a super-2 number, since 2×19121039² = 731228264879042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19120999 and 19121017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19121029) 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 7 ways as a sum of consecutive naturals, for example, 80222 + ... + 80459.

It is an arithmetic number, because the mean of its divisors is an integer number (2892276).

Almost surely, 2^19121039 is an apocalyptic number.

19121039 is a deficient number, since it is larger than the sum of its proper divisors (4017169).

19121039 is a wasteful number, since it uses less digits than its factorization.

19121039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160705.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 19121039 is about 4372.7610270857. The cubic root of 19121039 is about 267.4055986224.

The spelling of 19121039 in words is "nineteen million, one hundred twenty-one thousand, thirty-nine".