172190019 has 4 divisors (see below), whose sum is σ = 229586696. Its totient is φ = 114793344.

The previous prime is 172189967. The next prime is 172190033. The reversal of 172190019 is 910091271.

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

It is not a de Polignac number, because 172190019 - 2¹¹ = 172187971 is a prime.

It is a super-2 number, since 2×172190019² = 59298805286440722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172190219) 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, 28698334 + ... + 28698339.

It is an arithmetic number, because the mean of its divisors is an integer number (57396674).

Almost surely, 2^172190019 is an apocalyptic number.

172190019 is a deficient number, since it is larger than the sum of its proper divisors (57396677).

172190019 is an equidigital number, since it uses as much as digits as its factorization.

172190019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57396676.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 172190019 is about 13122.1194553319. The cubic root of 172190019 is about 556.3344982269.

The spelling of 172190019 in words is "one hundred seventy-two million, one hundred ninety thousand, nineteen".