172680019 has 2 divisors, whose sum is σ = 172680020. Its totient is φ = 172680018.

The previous prime is 172679993. The next prime is 172680031. The reversal of 172680019 is 910086271.

It is a happy number.

172680019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172680019 - 2¹¹ = 172677971 is a prime.

It is a super-2 number, since 2×172680019² = 59636777923680722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172680049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86340009 + 86340010.

It is an arithmetic number, because the mean of its divisors is an integer number (86340010).

Almost surely, 2^172680019 is an apocalyptic number.

172680019 is a deficient number, since it is larger than the sum of its proper divisors (1).

172680019 is an equidigital number, since it uses as much as digits as its factorization.

172680019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 172680019 is about 13140.7769557207. The cubic root of 172680019 is about 556.8617175771.

The spelling of 172680019 in words is "one hundred seventy-two million, six hundred eighty thousand, nineteen".