19172073 has 8 divisors (see below), whose sum is σ = 27066528. Its totient is φ = 12029504.

The previous prime is 19172071. The next prime is 19172081. The reversal of 19172073 is 37027191.

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 19172073 - 2¹ = 19172071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19172073.

It is not an unprimeable number, because it can be changed into a prime (19172071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187911 + ... + 188012.

It is an arithmetic number, because the mean of its divisors is an integer number (3383316).

Almost surely, 2^19172073 is an apocalyptic number.

It is an amenable number.

19172073 is a deficient number, since it is larger than the sum of its proper divisors (7894455).

19172073 is a wasteful number, since it uses less digits than its factorization.

19172073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375943.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 19172073 is about 4378.5925820976. The cubic root of 19172073 is about 267.6432888828.

The spelling of 19172073 in words is "nineteen million, one hundred seventy-two thousand, seventy-three".