172284397 has 6 divisors (see below), whose sum is σ = 175599242. Its totient is φ = 169030992.

The previous prime is 172284383. The next prime is 172284407. The reversal of 172284397 is 793482271.

It can be written as a sum of positive squares in 3 ways, for example, as 112593321 + 59691076 = 10611^2 + 7726^2 .

It is a de Polignac number, because none of the positive numbers 2^k-172284397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172284367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27858 + ... + 33475.

Almost surely, 2^172284397 is an apocalyptic number.

It is an amenable number.

172284397 is a deficient number, since it is larger than the sum of its proper divisors (3314845).

172284397 is an frugal number, since it uses more digits than its factorization.

172284397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61439 (or 61386 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 172284397 is about 13125.7151043286. The cubic root of 172284397 is about 556.4361226757.

The spelling of 172284397 in words is "one hundred seventy-two million, two hundred eighty-four thousand, three hundred ninety-seven".