172967081 has 4 divisors (see below), whose sum is σ = 197676672. Its totient is φ = 148257492.

The previous prime is 172967063. The next prime is 172967099. The reversal of 172967081 is 180769271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180769271 = 7933 ⋅22787.

It is an interprime number because it is at equal distance from previous prime (172967063) and next prime (172967099).

It is a cyclic number.

It is not a de Polignac number, because 172967081 - 2⁶ = 172967017 is a prime.

It is a super-2 number, since 2×172967081² = 59835222219321122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172963081) 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 3 ways as a sum of consecutive naturals, for example, 12354785 + ... + 12354798.

It is an arithmetic number, because the mean of its divisors is an integer number (49419168).

Almost surely, 2^172967081 is an apocalyptic number.

It is an amenable number.

172967081 is a deficient number, since it is larger than the sum of its proper divisors (24709591).

172967081 is an equidigital number, since it uses as much as digits as its factorization.

172967081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24709590.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 172967081 is about 13151.6949858184. The cubic root of 172967081 is about 557.1701210258.

The spelling of 172967081 in words is "one hundred seventy-two million, nine hundred sixty-seven thousand, eighty-one".