172289465 has 4 divisors (see below), whose sum is σ = 206747364. Its totient is φ = 137831568.

The previous prime is 172289461. The next prime is 172289471. The reversal of 172289465 is 564982271.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 118897216 + 53392249 = 10904^2 + 7307^2 .

It is a cyclic number.

It is not a de Polignac number, because 172289465 - 2² = 172289461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172289461) 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, 17228942 + ... + 17228951.

It is an arithmetic number, because the mean of its divisors is an integer number (51686841).

Almost surely, 2^172289465 is an apocalyptic number.

It is an amenable number.

172289465 is a deficient number, since it is larger than the sum of its proper divisors (34457899).

172289465 is an equidigital number, since it uses as much as digits as its factorization.

172289465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34457898.

The product of its digits is 241920, while the sum is 44.

The square root of 172289465 is about 13125.9081590570. The cubic root of 172289465 is about 556.4415787524.

The spelling of 172289465 in words is "one hundred seventy-two million, two hundred eighty-nine thousand, four hundred sixty-five".