172079987 has 8 divisors (see below), whose sum is σ = 174279600. Its totient is φ = 169886464.

The previous prime is 172079983. The next prime is 172080011. The reversal of 172079987 is 789970271.

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 172079987 - 2² = 172079983 is a prime.

It is a super-2 number, since 2×172079987² = 59223043851840338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172079983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85964 + ... + 87942.

It is an arithmetic number, because the mean of its divisors is an integer number (21784950).

Almost surely, 2^172079987 is an apocalyptic number.

172079987 is a deficient number, since it is larger than the sum of its proper divisors (2199613).

172079987 is an equidigital number, since it uses as much as digits as its factorization.

172079987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045.

The product of its (nonzero) digits is 444528, while the sum is 50.

The square root of 172079987 is about 13117.9261699401. The cubic root of 172079987 is about 556.2159709520.

The spelling of 172079987 in words is "one hundred seventy-two million, seventy-nine thousand, nine hundred eighty-seven".