172089331 has 4 divisors (see below), whose sum is σ = 176740432. Its totient is φ = 167438232.

The previous prime is 172089319. The next prime is 172089343. The reversal of 172089331 is 133980271.

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

It is an interprime number because it is at equal distance from previous prime (172089319) and next prime (172089343).

It is a cyclic number.

It is not a de Polignac number, because 172089331 - 2¹³ = 172081139 is a prime.

It is a super-2 number, since 2×172089331² = 59229475688055122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172089361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2325495 + ... + 2325568.

It is an arithmetic number, because the mean of its divisors is an integer number (44185108).

Almost surely, 2^172089331 is an apocalyptic number.

172089331 is a deficient number, since it is larger than the sum of its proper divisors (4651101).

172089331 is an equidigital number, since it uses as much as digits as its factorization.

172089331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651100.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 172089331 is about 13118.2823189623. The cubic root of 172089331 is about 556.2260383399.

The spelling of 172089331 in words is "one hundred seventy-two million, eighty-nine thousand, three hundred thirty-one".